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April 17, 2014

Search: chemistry - human calorimeter

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chemistry - human calorimeter
From experience, you know that you produce significantly more heat when you are exercising than when you are resting. Scientists can study the heat that is produced by human metabolism reactions using a human calorimeter. Based on what you know about calorimetry, how would ...
Sunday, February 27, 2011 at 9:12pm by Farah

Chemistry
Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in human. The value of deltaHcombustion for dimethylphthalate (C10H10O4) is 4685 kJ/mol. Assume 1.035 g of dimethylphthalate is combusted in a calorimeter whose heat capacity (...
Monday, October 15, 2012 at 12:21am by Amanda

Chemistry
Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in human. The value of deltaHcombustion for dimethylphthalate (C10H10O4) is 4685 kJ/mol. Assume 1.035 g of dimethylphthalate is combusted in a calorimeter whose heat capacity (...
Monday, October 15, 2012 at 12:37am by Amanda

chemistry - human calorimeter
Exactly how can we help you?
Sunday, February 27, 2011 at 9:12pm by DrBob222

chemistry
In the following experiment, a coffee-cup calorimeter containing 100mL of H2 is used. The initial temperature of the calorimeter is 23.0 C . If 3.40g CaCl2 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of ...
Thursday, November 24, 2011 at 11:44pm by Yuli

Chemistry - General
1. Consider a calorimeter into which 135g of water at 45.3 degrees Celsius is added. The initial temperature of the calorimeter was 23.8C and the equilibrium temperature of the water and the calorimeter is 39.6C. Assuming there is no heat loss to the surroundings, what is the ...
Friday, July 24, 2009 at 6:20pm by Sahar

chemistry
In the following experiment, a coffee-cup calorimeter containing 100ml of H2O is used. The initial temperature of the calorimeter is 23 degrees celcius. If 7.20g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The ...
Friday, October 3, 2008 at 11:23pm by kayla

chemistry
If that is a bomb calorimeter it is important to maintain a constant volume. If it isn't a bomb calorimeter you want to minimize heat transfer out of or into the calorimeter set up.
Friday, October 11, 2013 at 3:08pm by DrBob222

chemistry
In the following experiment, a coffee-cup calorimeter containing 100 mL of H2O is used. The initial temperature of the calorimeter is 23 degrees Celsius. If 4.00 g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The ...
Monday, October 19, 2009 at 4:50pm by Katherine

Chemistry
Thankyou Dr. Bob and can you please help me on one more question if this reaction goes to completion what would the final concentration of NH4Cl in the calorimeter. I know how to figure it out if its not in the calorimeter but I am wondering if the calculations are different ...
Monday, November 12, 2012 at 11:05pm by Emma

chemistry
a reaction witha known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter.
Wednesday, April 27, 2011 at 7:46pm by ben

chemistry
a reaction witha known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter.
Wednesday, April 27, 2011 at 8:05pm by ben

chemistry
At constant volume, the heat of combustion of a particular compound is 3334.0 kJ/mol. When 1.569 g of this compound (molar mass = 125.76 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.173 C. What is the heat ...
Wednesday, November 28, 2012 at 2:35pm by Ag10

chemistry
At constant volume, the heat of combustion of a particular compound is 3323.0 kJ/mol. When 1.489 g of this compound (molar mass = 131.02 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.077 C. What is the heat ...
Wednesday, February 6, 2013 at 11:55pm by Brianna

Chemistry
At constant volume, the heat of combustion of a particular compound is 3547.0 kJ/mol. When 1.239 g of this compound (molar mass = 196.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.539 C. What is the heat ...
Tuesday, June 18, 2013 at 8:44pm by Jessica

chemistry
At constant volume, the heat of combustion of a particular compound is 3599.0 kJ/mol. When 1.365 g of this compound (molar mass = 102.90 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 7.819 C. What is the heat ...
Sunday, October 27, 2013 at 7:53pm by brianna

CHEMISTRY
A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0C are added to 97.3 g water in the calorimeter at 16.0C. The final temperature is 26.0C. Calculate the heat capacity of the calorimeter in J/C.
Monday, April 16, 2012 at 11:50pm by Sarah

CHEMISTRY
A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0C are added to 97.3 g water in the calorimeter at 16.0C. The final temperature is 26.0C. Calculate the heat capacity of the calorimeter in J/C.
Tuesday, April 17, 2012 at 11:42pm by Sarah

chemistry
A chemical reaction in a bomb calorimeter evolves 3.86 kJ of energy in the form of heat. If the temperature of the bomb calorimeter increases by 4.17 K, what is the heat capacity of the calorimeter?
Wednesday, November 7, 2012 at 2:08pm by nikkkki

Chemistry 2
I have to calculate the Ccal using the following info: Initial Temp of water outside calorimeter=22.6 C Initial Temp of water inside the calorimeter= 100 C Volume of water in calorimeter= 50mL Volume of water outside calorimeter= 300mL Final Temp of water in calorimeter=27.9 C...
Saturday, July 16, 2011 at 4:26pm by Lily

Chemistry
A calorimeter contains 50.0 mL of water; both are at 21.2 degrees C. Then the 50.0 mL of water at 57.6 degrees C is added to the calorimeter. At equilibrium, the final temperature of the water and the calorimeter is 33.3 degrees C. Calculate the heat capacity, C, of the ...
Tuesday, October 22, 2013 at 12:04pm by Jay

chemistry
the following reaction is carried out in a bomb calorimeter: 4NH3 (g) +5O2 (g)-->4NO (g)+6H2O (g) The calorimeter constant is 45.0kJ/K. when 34.0g of NH3 are reacted in the calorimeter, the temp rises by 10 degrees C. What is the change in energy, delta E, for the rxn?"
Thursday, January 13, 2011 at 8:57pm by madison

Chemistry
In the following experiment, a coffee-cup calorimeter containing 100. mL of H2O is used. The initial temperature of the calorimeter is 23.0 degrees C. If 3.80 g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The ...
Thursday, June 21, 2012 at 6:56pm by Abby

Chemistry
In a bomb calorimeter, a 6.50 g sample of octane (C8H18) is combusted. The combustion enthalpy for octane is -5.45 MJ per mol C8H18. The temperature change of the calorimeter is 16.5 oC. What is the heat capacity of the calorimeter?
Friday, March 14, 2014 at 3:09pm by Mary

chemistry
A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.45C to 23.65C. The heat capacity of the calorimeter, excluding the water, is 2.21 kJ/C. determine the heat released by the combustion.
Saturday, August 15, 2009 at 11:26am by jessica

Chemistry
In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of the solution in the ...
Sunday, June 17, 2012 at 1:35pm by Ali

AP Chemistry
THe following reaction is carried out in a bomb calorimeter: 4NH3(g )+ 5O2(g) ---> 4NO(g) + 6H20 The calorimeter constant is 45.0kJ/K. WHen 34.0g of NH3 are reacted in the calorimeter, the temperature rises by 10.0C. What is the change in energy, dE (where d is delta), for ...
Sunday, October 2, 2011 at 5:33pm by bluedevil

chemistry
In the following experiment, a coffee-cup calorimeter containing 100 mL of H20 is used. The initial temperature of the calorimeter is 23.0 C . If 3.60 g of CaCl2is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of the ...
Thursday, October 20, 2011 at 3:01pm by Colin

Chemistry
In a calibration of a calorimeter, 50.0 g of water at 60.0 *C is added to 50.0 g of water at 20.0 *C to give a mixture at 39.0 *C. What is the heat capacity of the calorimeter used in this experiment? If the calorimeter has a mass of 5.4g, what is its specific heat?
Monday, November 29, 2010 at 11:44pm by Stacy

CHEMISTRY
A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.45 C to 23.65 C. The heat capacity of the calorimeter, excluding the water, is 2.21 kJ/C. Using this information, determine the heat released by ...
Saturday, October 17, 2009 at 3:30pm by Judy

Chem
Use a bomb calorimeter... or some kind of calorimeter... I'm just guessing; hopefully the calorimeter idea isn't stupid! Good luck.
Sunday, November 23, 2008 at 10:33pm by Jeremy

Chemistry
The initial temperature of a bomb calorimeter is 28.50C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gC), how much heat is absorbed by the reaction?
Monday, July 8, 2013 at 9:52am by Timmy

chemistry
mass of the metal 7.26g volume of water in the calorimeter 10mL initial temp of water in calorimeter 21.5 degrees C initial temp of metal 95.5 d C final temp in mixture in calorimeter 23.8 D C question: calculate the energy lost by the metal taking into consideration that it ...
Thursday, February 28, 2013 at 8:52pm by may

chemistry
The calorimeter constant is usually presented in units of joules per degree Celsius (J/C) or joules per kelvin (J/K). A calorimeter constant is a constant that quantifies the heat capacity of a calorimeter. It is calculated by applying a known amount of heat to the ...
Friday, October 15, 2010 at 4:33am by Dr Russ

Chemistry
How much heat is absorbed by the calorimeter (qcal) if the temperature is increased 12.4 C and the calorimeter constant (Ccal) is 3.30 J/C?
Sunday, June 23, 2013 at 7:18pm by Ashley

Chemistry
The complete combustion of 0.100 mol of CH4 in oxygen in a bomb calorimeter caused the water of the calorimeter to rise in temperature from 25.00 degrees Celsius to 37.70 degrees Celsius. Suppose that the combustion of the 0.1 mol of CH4 was instead run at constant pressure (1...
Friday, February 6, 2009 at 12:34am by HELP!!!

chemistry
How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792 grams of water.
Wednesday, December 8, 2010 at 6:45pm by Brittany

chemistry
A 0.016076-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 24.5oC. If the heat capacity of the calorimeter is 4.98 kJ (oC)-1, then what is the constant volume heat of combustion of this ...
Saturday, March 1, 2014 at 6:29pm by abby

chemistry
A 0.016076-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 24.5oC. If the heat capacity of the calorimeter is 4.98 kJ (oC)-1, then what is the constant volume heat of combustion of this ...
Wednesday, March 5, 2014 at 6:13pm by abby

Chemistry
(A). A reaction with a known q is performed in a bomb calorimeter and is found that 10.0 kj of heat is required to raise the temperature of the calorimeter by 2.15 degrees C. calculate the heat capacity of the calorimeter. (B). When 1.00 g of C2H6(g) is burned in the bomb ...
Wednesday, April 27, 2011 at 9:46pm by Ben

Chemistry I
In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the calorimeter (J/*C-...
Monday, October 22, 2012 at 11:32pm by Josh

Chemistry
Thank you very much. I needed help with one more. A bomb calorimeter evolves 4.66 kJ of heat. If the heat capacity of the calorimeter is 1.38 kJ/Celsius, what is the temp change of the calorimeter? I thought it may be 4.66/1.38= 3.38?
Monday, April 5, 2010 at 12:14pm by Danielle

Chemistry
A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(gC). As a result of the reaction, the temperature of the calorimeter increases from 22.00C to 29.3C. If 1 ...
Monday, July 8, 2013 at 10:48am by Timmy

chemistry
20.0 g of ammonium nitrate (NH4NO3) is dissolved in 125 g of water in a coffee-cup calorimeter, the temperature falls from 296.5 K to 286.4 K. Find the value of q for the calorimeter.
Saturday, November 23, 2013 at 12:34am by Sona

Chemistry
A candy sample is completely combusted in a bomb calorimeter. The calorimeter contains 982 g of water, and the measured temperature increase is 2.62C. What is the fuel value of the candy sample in nutritional Calories?
Thursday, November 17, 2011 at 11:51pm by Chemistry Chick

Chemistry
A sample of benzene, C6H6, weighing 3.51 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00 C to 37.18 C. If the heat capacity of the calorimeter is 12.05 kJ/K, what is the molar energy of combustion for benzene? Also...
Wednesday, March 17, 2010 at 11:32pm by Marie

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
Monday, March 31, 2008 at 10:26pm by depressed

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 10 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
Thursday, November 3, 2011 at 12:33am by Ashley

chemistry
The sodium hydroxide heats the water and the calorimeter absorbs the heat. The result is that the temperature of the water in the calorimeter rises.
Sunday, March 21, 2010 at 9:02pm by DrBob222

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
Monday, March 8, 2010 at 10:08pm by debra

chemistry
How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?
Friday, June 18, 2010 at 10:45pm by tsu

IB Chemistry
Why don't we use the bomb calorimeter to calculate the heat energy in the combustion of alcohol but we use the copper cup calorimeter?
Friday, March 1, 2013 at 8:28am by chirikamo

Chemistry
for the salt and water, assume it is a dilute solution, and the specific heat capacity is that of the water. Now for the calorimeter, it depends on the calorimeter material.
Wednesday, December 2, 2009 at 1:05pm by bobpursley

Chemistry
At constant volume, the heat combustion of a particular compound is -3447.0 KJ/mol. When 1.205 g of this compound (molar mass = 119.94 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.007 degrees C. What is the heat...
Sunday, December 9, 2012 at 11:40am by Angela

Chemistry
Assume the heat absorbed by the calorimeter was 200J. What is the calorimeter constant (Heat Capacity) if the temperature changed from 22C to 26C? I know the answer is 50 J/k. But I am not sure how to get this.
Monday, June 27, 2011 at 2:56pm by Lance

chemistry
a reaction known to release 1.78 kilojoule of heat takes place in a calorimeter containing 0.100L of soln. the temperature rose by 3.65C. next, a small peice of caco3 was placed in same calorimeter and 0.100L of dilute Hcl was poured over it. the temperature of the calorimeter...
Monday, November 16, 2009 at 2:55pm by mike

Chemistry
if 3.00 g of iron metal are reacted in a calorimeter with a heat capacity of 500 J/ degrees Celsius, what would be the final temperature of the calorimeter if its initial temperature were 23.0 C?
Wednesday, November 7, 2012 at 5:11pm by Gabby

Chemistry
if 3.00 g of iron metal are reacted in a calorimeter with a heat capacity of 500 J/ degrees Celsius, what would be the final temperature of the calorimeter if its initial temperature were 23.0 C?
Wednesday, November 7, 2012 at 5:41pm by Gabby

Chemistry
The combustion of benzoic acid releases 26.38kJ/g and is often used to calibrate a bomb calorimeter. the combustion of 1.045 g of benzoic acid caused the temperature of the calorimeter to rise by 5.985C. Useing the same calorimeter, a sample of 0.876g of octane (C8H18) was ...
Thursday, October 4, 2012 at 3:23pm by Alisha

Chemistry
Hi I need help with these following questions. I have all of the data needed. Calculate the enthalpy change of the reaction for each trial (in kJ) 3. Calculate the heat released by the reaction for each trial (in J): 2. Calculate the heat absorbed by the calorimeter for each ...
Sunday, November 17, 2013 at 8:08pm by Matt

chemistry
substance X has a molar mass of 107.6 g/mol. When 2.50 g of substance x burns in an iron calorimeter, the temp. of the calorimeter and the water (2.000 Kg) increases from 25.8 deg. C to 38.7 deg. C. What is the molar heat of combustion of substance X in KJ/Mole. Heat capacity ...
Sunday, March 27, 2011 at 10:42am by carla

college chemistry
An electrical heater is used to add 19.50 kJ of heat to a constant-volume calorimeter. The temperature of the calorimeter increases by 4.50C. When 1.75 g of butanol (C4H9OH) is burned in the same calorimeter, the temperature increases by 14.58C. Calculate the molar heat of ...
Saturday, October 16, 2010 at 3:26pm by jojo

chemistry
a 12.0g of sample A (70.2g/mol)was burned in a bomb calorimeter in an excess of O2(g). A+2 O2(g)---> 2 CO2(g) +2 H2O(l) The temperature of teh calorimeter rose from 25.00 degrees celisus to 29.82 degree celisus. ifthe heat capacity of the calorimeter and its contents is 13....
Monday, November 19, 2012 at 1:23pm by evelyn

Chemistry
A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00C to 33.73C. If the heat capacity of the calorimeter and contents was 9.63 kJ/C, what is the value of q for burning 1.28 ...
Tuesday, June 7, 2011 at 8:26am by Lance

Chemistry
In a coffee-cup calorimeter, 1.70 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.71C. Assuming the solution has a heat capacity of 4.18 J/C g and ...
Monday, July 11, 2011 at 1:15pm by Brittney

Chemistry
The temperature rises from 25.00 C to 29.00 C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate Erxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/C . The molar mass of ...
Thursday, December 6, 2012 at 11:18pm by Emma

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
Monday, June 27, 2011 at 6:21pm by Lance

Chemistry
Assume a piece of hot metal is added to a calorimeter containing 50mL of water at 22C. The amount of heat released by the metal was determined to be 1000J, and the equilibrium temperature in the calorimeter was 26C. Remembering that the specific heat of water is 4.18 J/gC, how...
Monday, June 27, 2011 at 6:41pm by Lance

chemistry
Substance x has a molar mass of 107.6 g/mol. when 2.50 g of substance x burns in an iron calorimeter the temp. of calorimeter and water (2.000Kg)increases from 25.8 d Celsius to 38.7 d celsius. What is the molar heat of combustion of substance x in kJ/mol. the heat capacity of...
Sunday, March 27, 2011 at 3:14pm by carla

Chemistry
Naphthalene combustion can be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene is -40.1 kJ/g. When 0.8210 g of naphthalene was burned in a calorimeter containing 1,000. g of water, a temperature rise of 4.21°C was observed. ...
Monday, February 11, 2013 at 10:41pm by John

Chemistry
The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb calorimeter? the specific heat...
Thursday, October 11, 2012 at 12:11am by Kyle

Chemistry
The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb calorimeter? the specific heat...
Thursday, October 11, 2012 at 12:12am by Kyle

Chemistry
The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb calorimeter? the specific heat...
Thursday, October 11, 2012 at 12:23am by Kyle

physics
A copper calorimeter of mass ()g contains 380g of a liquid at 12degrees Celsius. A 20W heater is used for 3 minutes to raise the temperature of the liquid and calorimeter to 17 degrees Celsius. The calorimeter has a specific heat capacity of 400 J/K kg a.Calculate the heat ...
Thursday, March 22, 2012 at 6:47am by Matteo

chemistry
The enthalpy of combustion of benzoic acid (C6H5COOH) which is often used to calibrate calorimeters, is −3227 kJ/mol. When 1.402 g of benzoic acid was burned in a calorimeter, the temperature increased by 3.401 ◦ C. What is the overall heat capacity of the ...
Tuesday, October 2, 2012 at 8:54pm by Austin

chemistry
The enthalpy of combustion of benzoic acid (C6H5COOH) which is often used to calibrate calorimeters, is −3227 kJ/mol. When 1.402 g of benzoic acid was burned in a calorimeter, the temperature increased by 3.401 ◦ C. What is the overall heat capacity of the ...
Tuesday, October 2, 2012 at 9:54pm by Austin

chemistry
A small coffee cup calorimeter contains 110. g of H2O at 22.0C. A 100. g sample of lead is heated to 90.0C and then placed in the water. The contents of the calorimeter come to a temperature of 23.9C What is the specific heat of lead?
Tuesday, August 3, 2010 at 5:21pm by Joseph

Chemistry
The enthalpy of combustion of benzoic acid(C6H5COOH) which is often used to calibratecalorimeters, is −3227 kJ/mol. When 1.316 gof benzoic acid was burned in a calorimeter, the temperature increased by 2.226◦C. What is the overall heat capacity of the calorimeter? ...
Friday, August 3, 2012 at 5:23pm by Yannan Huang

Chemistry DrBob
I don't understand how you get the answer. I really don't understand any of this, how do I set it up with the numbers? once i get how to do this, then i feel i will understand how to set these up from here on out. so if you could, show all your work, thanks (A). A reaction ...
Wednesday, April 27, 2011 at 10:39pm by Ben

physics
If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22C to 73C and the mass of rock in the calorimeter was 185 grams, what is the specific heat, c, of the rock material?
Monday, April 1, 2013 at 3:48am by Shay

physics
If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22C to 73C and the mass of rock in the calorimeter was 189 grams, what is the specific heat, c, of the rock material?
Saturday, September 7, 2013 at 5:20am by omar

chemistry
-You have a sample of unkonw metal that you have heated to 100 deg Celsius (oC) in boilin water. If, unknown to you, the metal sample cools somewhat before being added to your calorimeter, what will be the effect on the delta T for the water in your calorimeter (assume you ...
Thursday, January 29, 2009 at 12:46am by kristine

chemistry
The enthalpy of combustion of benzoic acid,C6H5COOH, which is often used to calibrate calorimeters, is -3227kJ/mol. When 1.236g of benzoic acid was burned in a calorimeter, the tempurature increased by 2.345K. What is the specific heat of the calorimeter?
Sunday, November 2, 2008 at 11:09pm by annemarie

Chemistry
Camphor (C10H16O) has a heat of combustion of 5903.6 kJ/mol. When a sample of camphor with a mass of 0.124 g is burned in a bomb calorimeter, the temperature increases by 2.28 oC. Calculate the heat capacity of the calorimeter.
Sunday, September 16, 2012 at 8:41pm by Nisah

chemistry-URGENT
Hydrazine is used as a rocket fuel. When 1.50 g of hydrazine, N2H4, was burned in a bomb calorimeter, temperature increased from 23.57 C to 28.84 C. The heat capacity of the calorimeter was 5.510 kJ/C. Determine the enthalpy of combustion of octane.
Sunday, April 10, 2011 at 7:59pm by Maria

college chemistry
The enthalpy of combustion of benzoic acid,C6H5COOH, which is often used to calibrate calorimeters, is -3227kJ/mol. When 1.236g of benzoic acid was burned in a calorimeter, the tempurature increased by 2.345K. What is the specific heat of the calorimeter?
Monday, November 3, 2008 at 5:33am by annemarie

chemistry
A 0.167 g sample of Mg(s) is burned in a bomb calorimeter which has a heat capacity of 3081 J/C. In this process, the temperature of the calorimeter increased by 1.34 C. Calculate the heat given off by burning Mg(s) under these conditions (in kJ/mol).
Monday, March 21, 2011 at 11:13pm by Kamila

Chemistry
A 2.839-g sample of C2H4O was burned in a bomb calorimeter whose total heat capacity is 16.77 kJ/C. The temperature of the calorimeter increases from 22.62C to 26.87C. What is the heat of combustion per mole of C2H4O?
Monday, September 17, 2012 at 9:08pm by Nisah

Chemistry
The reaction between 0.055 g of calcium with an excess of water was carried out in an ice calorimeter. The volume of water in the calorimeter decreased by 0.20 mL during the reaction. Calculate the enthalpy of the reaction (in kJ/mol).
Saturday, November 24, 2007 at 3:01pm by Raj

Chemistrey
Lab exercise 10C Calibrating bomb Calorimeter Before Molar specific enthalpies of reaction can be determined, a bomb calorimeter must be calibrated using primary standard of precisely known molar enthalpy. Complete the analysis of the investigation report. Problem: What is the...
Wednesday, April 4, 2007 at 6:54pm by Calorimeter

chemistry
suppose that 100g h20 is added to calorimeter intially at 20C containing 100g of h20 at 20C. If calorimeter perfectly insulates, what would be the final temperature of the water?
Monday, November 18, 2013 at 4:18pm by lola

Chemistrey
Problem: What is the heat capacity of the newly assembled oxygen bomb calorimeter? Experimental design: An oxygen calorimeter is assembled and several samples of the primary standard, benzoic acid are burned using a constant pressure of excess oxygen. The evidence that is ...
Wednesday, April 4, 2007 at 6:55pm by Calorimeter

chemistry
Add the values of M*C*(delta T) for the water and the calorimeter. That will give you the answer. C is the specific heat and delta T is the temperature change. M is the mass. For the calorimeter, they tell you what the product M*C (the heat capacity) is, so you don't need to ...
Saturday, August 15, 2009 at 11:26am by drwls

Chemistry - General
Isn't qH2O + qcalorimeter = 0? q H2O = mass x specific heat x delta T. q calor = mass x specific heat x delta T. note: mass x specific heat calorimeter = calorimeter constant. q H2O = 135 x 4.184 x (39.5-45.3) q calorimeter = constant x (23.8-39.6)
Friday, July 24, 2009 at 6:20pm by DrBob222

ap chem
Under constant-volume conditions the heat of combustion of glucose is 15.57 kJ/g. A 2.500g sample of glucose is burned in a bomb calorimeter. The temperature of the calorimeter increses from 20.55 C to 23.25 C. What is the total heat capacity of the calorimeter? Which ...
Wednesday, September 26, 2007 at 9:12pm by lily

Chemistry
A 1.55-g sample of propane, C3H8, was burned in a bomb calorimeter whose total heat capacity is 12.3 kJ/C. The temperature of the calorimeter plus its contents increased from 21.36C to 27.69C. What is the heat of combustion per gram of propane?
Monday, September 17, 2012 at 9:44pm by Nisah

chemistry
A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g C). As a result of the reaction, the temperature of the calorimeter increases from 22.00C to 29.3C. If 1 ...
Thursday, August 22, 2013 at 5:59pm by sean

Physics
How do i determine the mass of ice initially in the calorimeter when dry saturated steam is passed into 250g of a mixture of ice and water in a calorimeter of thermal capacity 45J/K when all the ice has just melted,and the mass of the content in the calorimeter has increased ...
Sunday, March 4, 2012 at 2:13am by Emmanuel

Chemistry
The combustion of 0.1583 g benzoic acid increases the temperature of a bomb calorimeter by 2.93C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) A 0.1710 g sample of vanillin (C8H8O3) is then burned in the ...
Sunday, November 13, 2011 at 4:06pm by Bill

chemistry 106
A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.
Wednesday, March 3, 2010 at 6:33pm by Tanisha

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