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April 19, 2014

Search: calculate the quantity of heat, in kJ, required to raise the temperature of a 2.15kg iron ba 24 degrees Celsius

Number of results: 43,144

chemistry
Some properties of aluminum are summarized in the following list. normal melting point 658C heat of fusion 0.395 kJ/g normal boiling point 2467C heat of vaporization 10.52 kJ/g specific heat of the solid 0.902 J/gC (a) Calculate the quantity of energy required to heat 1.75 ...
Saturday, May 1, 2010 at 5:54pm by Jake

Chemistry
Some properties of aluminum are summarized in the following list. normal melting point 658C heat of fusion 0.395 kJ/g normal boiling point 2467C heat of vaporization 10.52 kJ/g specific heat of the solid 0.902 J/gC (a) Calculate the quantity of energy required to heat 1.75 ...
Saturday, May 1, 2010 at 6:46pm by Charles

Chemistry
22.) The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of liquid water is 4.18 J/gC. (1) What quantity of heat is required to melt 25.0 g of ice at 0C? (2) What quantity of heat is required to ...
Tuesday, March 5, 2013 at 8:33pm by Adriana

chemistry
Calculate the energy in the form of heat, in kJ, required to convert 225 grams of liquid water at 21.0 C to steam at 115 C. Heat of fusion = 0.333 kJ/g; heat of vaporization = 2.26 kJ/g; specific heat capacities: liquid water = 4.18 J/gC., steam = 1.92 J/gC. A. 88.5 kJ B...
Sunday, October 2, 2011 at 2:55am by Ninaya

AP chemistry
The specified heat capacity of silver is 0.24 J/C.g. Please help with this Ap chem quastion.? a. Calculate the energy required to raise the temperature of 150.0 g Ag from 273 K to 298. b. Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0C (called the ...
Saturday, October 23, 2010 at 3:57pm by Nardos

AP chemistry
The specified heat capacity of silver is 0.24 J/C.g. Please help with this Ap chem quastion.? a. Calculate the energy required to raise the temperature of 150.0 g Ag from 273 K to 298. b. Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0C (called the ...
Saturday, October 23, 2010 at 4:31pm by Nardos

chem 101
How much heat is required to raise the temperature of exactly one liter of water fro m 60 F to 180 F? a. 79 kJ b. 120 kJ c. 251 kJ d. 279 kJ correct** e. 502 kJ help with solution?
Friday, April 13, 2012 at 2:35pm by Anonymous

enthalpy change
The heat required to raise the beaker temperature will be 3/4 as much the second time, becasue of the delta-T rTIO. The heat required to heat the liquid will be higher by a factor (200/250)(2.43/0.67) = 2.90 Calculate the total heat required in the second case. The ratio (heat...
Sunday, October 10, 2010 at 6:30pm by drwls

physics
Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00◦C.
Tuesday, July 5, 2011 at 9:10pm by angel

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
Why not choose a convenient temperature gain (say 1 degree C) and a convenient mass (say 1 g) and calculate the heat required to raise the T by that amount? q = mass x specific heat x delta T q = 1 x 0.031 x 1 and q = 1 x 0.057 x 1. Which requires more heat to raise 1 g of the...
Monday, September 10, 2012 at 10:55am by DrBob222

Chemistry
If 2.80 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 27C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 40.C to 58C?
Thursday, June 21, 2012 at 3:34am by Joseph

Chemistry
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
Wednesday, March 13, 2013 at 6:28pm by Faith

Chem
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
Wednesday, March 13, 2013 at 6:57pm by Faith

chemistry
If 3.50 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 30.C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 31C to 54C?
Friday, November 12, 2010 at 2:06pm by Delaney kidd

Chemistry
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
Wednesday, March 13, 2013 at 7:10pm by Faith (Pls Help) (Would Trully Appreciate it)

CHEMISTRY
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
Wednesday, March 13, 2013 at 8:02pm by Faith (Pls Help) (Would Trully Appreciate it)

CHEM
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
Wednesday, March 13, 2013 at 8:08pm by Faith (Pls Help) (Would Trully Appreciate it)

chem
The specific heat capacity of silver is 0.24 J/Cg. (a) Calculate the energy required to raise the temperature of 140.0 g Ag from 273 K to 295 K. J (b) Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0C (called the molar heat capacity of silver). J/...
Monday, November 26, 2007 at 1:41pm by mel

Physics
2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank ...
Saturday, July 13, 2013 at 1:26pm by Danny

Thermodynamics
2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank ...
Saturday, July 13, 2013 at 11:34pm by Danny

Chemistry
11. Think 20. Actually, lawyer wise, it is false. specific heat content is the amount of heat required to raise a specific mass a specific increase in temperature. That being said, its units can be J/gC or kJ/kg-C or kJ/mole-C But in your text, I bet it is true, joules per gram-C
Monday, October 25, 2010 at 4:45pm by bobpursley

Chemistry
Calculate the amount of heat (in kJ) required to convert 87.5 g of water to steam at 100C. (The molar heat of vaporizaion of water is 40.79 kJ/mol.)
Wednesday, December 1, 2010 at 2:32pm by MC

Chemistry
Step 1: Heat to raise T of ice at -14.0 C to 0.0 C q_1 = m⋅C_s,ice⋅ΔT q_1 = (13.0 g)(2.09 J/g⋅C)[0.0 C - (-14.0 C)] q_1 = 380.38 J q_1 = 0.38038 kJ Step 2: Heat to melt ice at 0.0 C q_2 = n⋅ΔH_fus q_2 = [13.0 g⋅(1 mol/18.016 g)&#...
Sunday, March 29, 2009 at 4:34pm by Pete

chemistry
If 2.10 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 28C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 34C to 57C?
Wednesday, October 6, 2010 at 3:03am by ruby

Chemistry Help!!!
1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...
Sunday, November 14, 2010 at 1:30pm by Sarah

Science
Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100C. The molar heat of vaporization of water is 40.6 kj/mol
Monday, March 25, 2013 at 9:32pm by Emily

Chem ? Help!
What is the answer and how do I Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100C. The molar heat of vaporization of water is 40.6 kJ/mol.
Monday, May 19, 2008 at 2:02pm by Lisa

Chemistry Help!!!
1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...
Sunday, November 14, 2010 at 1:30pm by Sarah

Chemistry
1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...
Sunday, November 14, 2010 at 4:46pm by Sarah

Chemistry
1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...
Sunday, November 14, 2010 at 5:03pm by Sarah

physics
calculate the amount of heat energy required to raise the temperature of a 5kg block of solid platinum from 0 degrees celsius to 25 degrees celsius. the specific heat of platinum is 133j/kg k. how much heat energy is required to raise 5kg of water by the same amount? the ...
Saturday, January 8, 2011 at 11:59am by charlie

please help with this question need to know by 8/4
How much heat energy is required to raise the temp of 5 kilograms of coal from 20 degree celsius to 220 degrees celsius? 314 j 6,573 j 4,187,000 j 1,314,718 j You need the specfifc heat of coal to answer that question, and that depends somewhat upon the type. Did they mention ...
Wednesday, August 3, 2005 at 9:24pm by alf

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

Physics
Follow the following steps: 1. Calculate the ice block's mass from its volume and density. 2. Compute heat required to raise its temp. from -19.3 degC to 0 deg - Q1 3. Consider latent heat required to change the state from ice at 0 deg. to water at 0 deg. - Q2 3. Compute heat ...
Tuesday, July 31, 2012 at 8:08pm by Ajayb

Chemistry (Thermo)
Your answer to (a) looks correct. For (b), divided the heat release by the heat of fusion of water, 333 Kj per kg. For (c), divide the heat realse by (333 +418 kJ) = 551 kJ/kg For (c) add the heat of vaporization to the amount of heat required per kg, and divde that into the ...
Friday, September 10, 2010 at 10:25am by drwls

chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/gC and 2.03 J/gC, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/gC, calculate the total quantity of ...
Tuesday, February 16, 2010 at 7:21pm by Emily

CHEMISTRY
Given that the specific heat capacities of ice and steam are 2.06 J/gC and 2.03 J/gC, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/gC, calculate the total quantity of ...
Tuesday, November 2, 2010 at 11:41pm by Riley

Chemistry please help
Energy/photon = hc/wavelength. Remember to change wavelength meters and use c in m/s. heat required = mass x density x specific heat x delta T. Everything is here to calculate heat required. Knowing heat/photon and the total energy required you can calculate the number of ...
Monday, November 3, 2008 at 9:51pm by DrBob222

Heat of Formation
When 10.00 g of iron is burned in O2(g)to form Fe3O4 (s) , enough heat is generated to raise the temperature of 784 g of water from 18.0 C to 38.0 C. Calculate the heat of formation of Fe3O4 (s) under these conditions in kJ/mol.
Friday, November 6, 2009 at 2:13pm by Kyle

Chemistry
Calculate the amount of heat (in calories) required to raise the temperature of 200g of water from 20C to 50C. The specific heat of water is 1.00 cal/g. I have done other spacific heat problems but on this one i don't know how to start...
Tuesday, November 10, 2009 at 7:08pm by Christina

physics
Besides the heat energy needed to raise the temperature of the lead to the 327.4 C melting poing, you need to provide the heat of fusion of lead, in order to melt it. The heat of fusion of lead is 27 kJ/kg. See if that raises the required velocity enough to give the "correct" ...
Sunday, April 15, 2012 at 3:24am by drwls

Chemistry
How much heat, in kilojoules (kJ), is required to raise the temperature of 2.50kg Hg(l) from -20.0 to -6.0C? Assume a density of 13.6g/ml and a molar heat capacity of 28.0 J mol -1 C -1 for Hg(l). Please helpppppp .... thanks in advance
Monday, October 21, 2013 at 4:05pm by Bob

Physics
The heat of fusion of 334 J/g (or kJ/kg) is a measured quantity. Usually that value is used to determine the heat needed to melt ice; e.g., q = heat required to melt 25 g ice = 25 g x 334 J/g = ?? J.
Tuesday, June 30, 2009 at 3:31pm by DrBob222

Chemistry
Lithium metal is a highly reactive metal that oxidizes instantly in water or air. Given the data below, calculate the energy required to heat 10.0 g of Li from 150.0 C to 200.0 C. Molar heat capacity (solid) = 3.58 J/C mol Molar heat capacity (liquid) = 4.379 J/C mol ...
Thursday, April 25, 2013 at 11:53pm by Johnny

Chemistry
Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 25.0C to gaseous CCl4 at 76.8C (the normal boiling point for CCl4)? The specific heat of CCl4(l) is its heat of fusion is and its heat of vaporization is
Tuesday, April 13, 2010 at 7:32pm by Bob

chemistry
The enthalpy of vaporization at 298 K for diethylether (C4H10C) is 26.0 kj/mol. How much heat would be required to vaporize 1.00 L of the ether at 298 K if its density is 0.714 g/L ? A) 250 kj B) 74.1 kj C) 186 kj D) 130 kj E) 440 kj
Monday, June 21, 2010 at 2:28pm by Jim

Math
A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4C to a final temperature of 65C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85C. Calculate the ...
Sunday, February 17, 2013 at 11:19am by Paul

Will Someone please respond! Chem
Will you please help me with this also? How much heat do you need to raise the temperature of 150 g of ice from 30oC to 15oC? 4.61 kJ <--This is my answer.Is itright? 4.68 kJ 5.49 kJ 9.40 kJ
Friday, June 22, 2012 at 11:34am by anonymous

Chemistry (Thermo)
Your answer to (a) looks correct. For (b), divided the heat release by the heat of fusion of water, 333 Kj per kg. For (c), divide the heat realse by (333 +418 kJ) = 551 kJ/kg Note:I believe drwls make a typo here. I think he meant to type 751 and not 551. :-) For (c) add the ...
Friday, September 10, 2010 at 10:25am by DrBob222

Physics Help
Using Problem 5 page 234 from http://books.google.com.ua/books?id=PQRo3XuHHvYC&pg=PA262&lpg=PA262&dq#v=onepage&q&f=false From steam table at 22.5 bar Hw= 936.48 kJ/kg He = 1865.2 kJ/kg - enthalpy of evaporation (Latent heat) Enthalpy of 1 kg of wet steam is H=Hw+ζ He= =...
Sunday, July 14, 2013 at 5:35pm by Elena

Chemistry
What is the specific heat of a substance if 26.0 kJ are required to raise the temperature of 250. g of the substance from 34.0C to 201.0C?
Sunday, March 7, 2010 at 10:17pm by Tiffany

Chemistry
What is the specific heat of a substance if 35.5 kJ are required to raise the temperature of 345 g of the substance from 69.0C to 150.0C?
Monday, March 8, 2010 at 4:28pm by Megan

Chem
What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ A. -0.4 kJ B. 1776.7 kJ C. 0.4 kJ D. -1776.7 kJ E. -6.2 kJ
Sunday, October 26, 2008 at 9:44pm by Kyle

chemistry
I would calculate the heat required to melt ice, raise T to 100 C, raise T to 110 (in 3 separate steps) and call that q. Then -q = mass water x specific heat water x (Tfinal-Tinitial) to calculate mass water. Convert 25 g ice to moles H2O, convert mass H2O originally in the ...
Monday, December 5, 2011 at 1:29am by DrBob222

chem 101
How much heat is required to raise the temperature of exactly one liter of water fro m 60 F to 180 F? answer: 279 kj/mol
Wednesday, April 11, 2012 at 3:41pm by Anonymous

AP Chemistry
Convert 93 gallons H2O to grams. I would use 1 gallon = 3.785 L, convert to mL then use density of 1.00 g/mL to solve for grams. How much heat is required to heat this much water (in grams) from 60 F to 99 F. Convert 60 F and 99 F to C using (F-32)*5/9 = C. Then q = heat ...
Friday, October 11, 2013 at 6:09pm by DrBob222

Chemistry
Consider the following reaction: 2Fe2O3 --> 4Fe + 3O2 ∆Hrxn = +824.2 kJ The decomposition of 29.0 g of Fe2O3 results in a. the release of 150 kJ of heat b. the release of 12000 kJ of heat c. the absorption of 12000 kJ of heat d. the absorption of 150 kJ of heat e. ...
Saturday, September 21, 2013 at 9:07pm by Anonymous

chemistry
The heat released is the total of the heat required to raise the temperature of the water (1,000 grams) + heat to raise the temperature of the calorimeter. q = [mass H2O x specific heat water x (Tfinal-Tinitial)] + [cal x (Tfinal-Tinitial)]] = 0 Solve for q.
Monday, October 25, 2010 at 5:11pm by DrBob222

Chemistry
Calculate the amount of heat required to raise the temperature of a 54 g sample of water from 5C to 20.C.
Wednesday, September 15, 2010 at 10:33pm by Ben

Chemistry
Calculate the amount of heat required to raise the temperature of a 31 sample of water from 9 to 26
Wednesday, December 1, 2010 at 2:32pm by Anonymous

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

Chemistry
2Fe2O3 -> 4Fe+3O2 changeHrxn= +824.2 KJ The decomposition of 57.0 g of Fe2O3 results in The release of 23500 KJ of heat The absorption of 147 KJ of heat The absorption of 23500 KJ of heat The absorption of 294 KJ of heat The release of 294 KJ of heat The release of 147 KJ ...
Tuesday, October 9, 2012 at 11:16pm by Anonymous

Thermodynamics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Thursday, July 11, 2013 at 9:02pm by Danny

Thermodynamics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Friday, July 12, 2013 at 11:15pm by Danny

Thermodynamics
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Saturday, July 13, 2013 at 9:42am by Danny

Physics (Help)
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Sunday, July 14, 2013 at 1:15pm by Danny

Physics Help
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Sunday, July 14, 2013 at 5:35pm by Danny

Chemistry
How do i calculate the amount of heat required to raise the temperature of an 89 sample of water from 40 to 60.
Saturday, February 20, 2010 at 4:43pm by Kesha

Physics(Thermodynamics)
1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry. ANS = kJ ...
Friday, July 12, 2013 at 2:22pm by Danny

Physics
To raise the temperature of a 2.0-kg piece of metal from 20C to 100C, 61.8 kJ of heat is added. What is the specific heat of this metal in kJ/(kg.K)? Question 1 options: A) 0.39 B) 0.31 C) 1.6 D) 1.2 E) 0.77
Friday, August 12, 2011 at 10:48am by Zuen-Lee

ap chemistry
the heat of neutralization for a strong acid in dilute water solution is about 60 kJ/mol of H+. What quantity of heat in kJ is produced when 100 mL of 3 M HCl is mixed with 100 mL of 1 M KOH?
Friday, September 24, 2010 at 9:26pm by Sarah

chemistry
calculate the heat required to raise the temperature of 1.00 L of water from 17.0 degrees celcius to the boiling point
Tuesday, July 13, 2010 at 11:02pm by allison

chemistry
Calculate the amount of heat required to completely sublime 24.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
Sunday, September 7, 2008 at 1:22pm by Erin

chemo
How much heat (in kJ) does it take to melt 28.4 grams of ice at 0 C and raise the temperature of the resulting water to 25 C? Heat of fusion 334 J/g, Specific heat 4.184 J/g C ?
Tuesday, October 29, 2013 at 6:58pm by melissa

Chemistry
How much energy in kJ is required to raise a 1.75 kg block of gold from 25.0 C to 105.0 C? The specific heat of gold is 0.03083 cal/g C, but I don't know how to compute the answer to the question.
Wednesday, November 16, 2011 at 11:54am by Nathan

science
A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and exits as water condensate...
Monday, March 4, 2013 at 8:02pm by Bev

Food Chemestry
A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and exits as water condensate...
Monday, March 4, 2013 at 7:27pm by Bev

chemistry
Calculate the amount of heat required to completely sublime 76.0g of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
Sunday, September 1, 2013 at 9:40pm by cj

chemistry
Propane gas is used to heat a tank of water. If the tank contains 200 L of water, what mass of propane will be required to raise its temperature from 20 degrees C to 65 degrees C. The heat of combustion for propane is -2220 kJ/mol.
Thursday, November 4, 2010 at 10:01pm by Ray

chemistry
q to heat water from 23.24 to 29.77 = mass H2O x specific heat H2O x delta T = xx J. Change to kJ. q2 to heat calorimeter = 6.35 x delta T = yy kJ. Add xx kJ + yy kJ to obtain total heat produced by 7.02 g sucrose. That gives you zz kJ/7.02 g. Convert to kJ/g and to kJ/mol. ...
Sunday, April 20, 2008 at 11:46am by DrBob222

Chemistry
When 25.0 g of ethanol vapor condenses, 23.6 kJ of heat is released. How much heat is required in kJ to vaporize 254 g of ethanol?
Wednesday, October 13, 2010 at 7:36pm by Jordin

chemistry
if the heat of combustion of glucose is -2808 kJ/mol, how many grams of glucose are required to supply 1650 kJ of heat?
Monday, November 12, 2012 at 12:10am by Anonymous

Physics - calorie
The calorie was defined in 1824 and is meant to the the heat required to raise the temperature of pure water by 1°C. The kcal, or Calorie, or kilocalorie is meant to be 1000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°C.
Sunday, September 20, 2009 at 4:45pm by MathMate

CHEMISTRY..please help..thanks
The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962C, and its normal boiling point is 2212C. What quantity of heat is required to melt 13.0 g of silver at 962C?
Tuesday, November 2, 2010 at 8:22pm by Jasmin

CHEMISTRY..please help..thanks
The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962C, and its normal boiling point is 2212C. What quantity of heat is required to melt 13.0 g of silver at 962C?
Tuesday, November 2, 2010 at 9:45pm by Jasmin

Chemistry
The molar heat of solution of NH4NO3 is 25.7 kJ/mol. How much heat (in kJ) would be required to dissolve 20 grams of NH4NO3 in water?
Tuesday, December 14, 2010 at 11:20pm by Hannah

Chem 101
Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter to the maximum temperature.
Wednesday, October 26, 2011 at 9:57pm by John

Chemistry
Calculate the heat (in kJ) required to transform 58.60 g of dinitrogen tetraoxide from a solid at a temperature of -9.3 C to a gas at 47 C. Report your answer to one decimal place. Data: Molar mass of dinitrogen tetraoxide, N2O4 = 92.011 g/mol Melting point = -9.3 C Boiling...
Monday, December 5, 2011 at 1:29pm by Matthew

AP Chemistry
Ammonia, NH3, is used as a refrigerant. At its boiling point of -33 degress Celcius, the enthalpy of vaporization of ammonia is 23.3 kJ/mol. How much heat is required to vaporize 355 g of ammonia at -33 degrees Celcius? a. 1.12 kJ b. 152 kJ c. 251 kJ d. 486 kJ e. 8.27 x 10^3 kJ
Friday, April 4, 2008 at 10:18am by Joe

Chemistry
Calculate the number of joules required to melt 57.4g of benzene at 5.5 degrees celsius? The heat of fusion for benzene is 9.87 KJ/mol and specific heat for liquid benzene is 1.63 J/g*deg)
Friday, February 19, 2010 at 12:39pm by Jake

chemistry
If you need only the heat required to vaporize it, then most of the data provided is not useful (heat fusion, etc). First, convert 3.50 L to grams using the density listed. I looked up the heat of vap on the web and found 32.54 kJ/mol. Change that to J/gram 32.54 kJ/mol x (1 ...
Monday, December 8, 2008 at 3:14pm by DrBob222

9th grade physical science
Calculate the specific heat for a 20 g piece of metal if 30 J of energy is required to raise its temperature by 12.5 K.
Saturday, October 16, 2010 at 9:11am by sarah

chemistry
calculate the heat required to raise the temperature of 100g HCl gas from 300k to 800k at constant pressure Cp = 30j/k mol
Tuesday, January 4, 2011 at 2:05pm by amira

chemistry
Calculate the amount of heat required to raise the temperature of a 25 sample of water from 7 to 25.
Monday, September 20, 2010 at 11:20pm by Anonymous

Chemistry
to get the heat released or absorbed, Q = mc(T2-T1) where m = mass of substance (units in g) c = specific heat capacity (units in J/g-K) T2 = final temperature T1 = initial temperature **note: if Q is (-), heat is released and if (+), heat is absorbed now we can only apply ...
Saturday, May 14, 2011 at 8:53pm by Jai

chem
A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution? I don't even know where to begin with the first one. Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it ...
Thursday, February 26, 2009 at 11:50pm by ash

physics
This is two problems rolled into one. q1 = heat required to raise T of solid from 40.0 C to 90.0 C. q1 = mass x specific heat x delta T. q2 = heat required to melt the solid once the T has reached 90.0 C. q2 = mass x heat of fusion. Total heat = q1 + q2.
Thursday, April 3, 2008 at 5:14pm by DrBob222

college chem
calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c
Monday, February 4, 2013 at 11:01pm by luis fernandez

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