Thursday
March 30, 2017

Post a New Question

Number of results: 66,043

Chemistry
A 300 Calorie donut is used to heat 5.0 kg of water. If the initial temperature of the water is 20 degrees C what will the final temperature of the water be? Assume no heat loss to the surroundings
March 11, 2009 by Kayla

Physics
A small electric immersion heater is used to boil 191.0 g of water for a cup of instant coffee. The heater is labeled 355.0 W, which means that it converts electrical energy to heat at this rate. Calculate the time required to bring this water from 12.0°C to the boiling point...
March 21, 2008 by Courtney

Physics
A small electric immersion heater is used to boil 191.0 g of water for a cup of instant coffee. The heater is labeled 355.0 W, which means that it converts electrical energy to heat at this rate. Calculate the time required to bring this water from 12.0°C to the boiling point...
March 25, 2008 by Josh G.

Chemistry
"Aluminum metal melts at 658.5°C. What would be the final temperature if 28.0 grams of solid aluminum at this temperature were placed into 520 grams of liquid aluminum at 1000.0°C? The heat of fusion for aluminum is 396 J/g, and the specific heat of liquid aluminum is 0.481 ...
September 7, 2016 by Tiffany

Physics
How much heat is required to raise the temperature of 70 g of water from 20 C to 80 C?
January 17, 2011 by Abida

Chemistry
The amount of solar radiation received anually in arizona is about 8.4 x 10^6 KJ/m^2. What mass of carbon must be burned into carbon dioxide to produce the same amount of energu in the following reaction? C + 02 --->CO2 deltaH=-393.5Kj
April 29, 2010 by AdElE

chemistry
When 0.373 g of compound X is burned completely in a bomb calorimeter containing 3000 g of water, a temperature rise of 0.341 C is observed. What is ∆Urxn for the combustion of compound X? The hardware component of the calorimeter has a heat capacity of 3.19 kJ/ ◦C...
January 11, 2012 by bob

chemistry
Calculate the number of GRAMS of carbon dioxide (CO2) produced when 100 grams of methane (CH4) are completely burned in oxygen (O2).
October 29, 2014 by Jeremy

Chemistry
A calorimetric determination of specific heat and enthalpy of solution was performed. How would each of the following procedural changes affect (higher than the correct value, lower than the correct value, or no change) the value of the specific heat of the metal determined in...
October 15, 2012 by Amy

Chemistry
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.187 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.5°C, what is the minimum temperature reached by the solution? [specific heat of water = 4.18 J/g°C; heat capacity of the calorimeter = ...
May 5, 2014 by Chris

Physics
Using the data in the table below,determine how many calories are needed to change 100g of solid x at 10degrees celcious to a vapour at 210degrees celcious:thermodynamic constants for substance x: heat of fusion 40,0cal/g heat of vaporization 150,0cal/g melting point 10,0'c ...
November 22, 2015 by John

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.
November 4, 2010 by Ray

chemistry
c= q/m*(delta)T q= heat or energy, measured in joules (J) c= specific heat of the substance m= mass of substance (delta)T= change in temperature It requires 14,749 J to heat 75.0 g of water from 20.0 degrees C to 67.0 degrees C?
September 9, 2012 by waffles

Chemistry
3) You pour 240 mL of Coke into a glass, where the T of the beverage is at 10.5 *C. You then add one ice cube of 45g. Determine the final temperature and the amount of ice remaining, if any. So I know that there won't be any more ice left because they will reach thermal ...
May 9, 2012 by Robert

Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will require 721.5 calories ...
March 5, 2012 by Tracy

Physics-is this correct?
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will require 721.5 calories ...
March 11, 2012 by Tracy

Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will require 721.5 calories ...
March 12, 2012 by Tracy

Chemistry
ALL ice melts at 0*C, but it requires MORE HEAT to melt 10g of ice than it would for 20g of ice. Why? I thought it was the opposite.
June 17, 2013 by Diana

Chemistry
a. If 5.57 g of glucose are produced through photosynthesis, what is the minimum number of moles of carbon dioxide and of water that were used? b. If the 5.57 g of glucose is an 80.2% yield, and assuming that carbon dioxide was the limiting reagent, how many moles of carbon ...
February 8, 2017 by Seida

Chemistry
12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed? q = mCHf I am having a lot of trouble on this type of problem in chem. Help and an explanation would be greatly appreciated. Thank you.
April 10, 2012 by JoJo

Chemistry
When coal is mined, it is tested for how much heat it can produce when it burns. A 1.245g sample of coal was placed into a calorimeter containing 2000.0 mLs of water at 17.5 degrees Celsius. After the coal was combusted in the calorimeter, the water's temperature was found to ...
September 15, 2016 by A. Pool

Chemistry
1. How much heat is added to 40.0 g of ice at –20 o C to convert it to steam at 120 oC? 2. How much heat is added to 25.0 g of ice at –25 o C to convert it to steam at 120 oC? 3. How much heat is added to 10.0 g of ice at –20 o C to convert it to steam at 120 oC? 4. How ...
January 2, 2013 by Briana

physics
The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. Suppose that a 62-gal (1.00 gal = 3.79 x 10-3 m3) unit starts with cold water at 11 °C and delivers hot water at 53 °C. The unit is electric and ...
February 18, 2013 by Anonymous

Physics
The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. Suppose that a 62-gal (1.00 gal = 3.79 x 10-3 m3) unit starts with cold water at 11 °C and delivers hot water at 53 °C. The unit is electric and ...
February 18, 2013 by Anonymous

Chemistry
if a cooler has 63 kg of ice how much energy is required to melt it at 0 degrees celcius? The heat fusion for water is 80 cal/gram
September 18, 2015 by Ali

chemistry
a block of aluminum is placed in 10.0g of water. the initial temperature of the water is 22.0 degrees celcious and its final temperature is 27.0 degrees celcious. what is the amount of heat released by the block of aluminum in calories if it had an initial temperature of 48.0 ...
April 30, 2013 by rachel

Chemistry
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solutions' final volume is 100.0 mL, the density is 1.00 g/mL, and the specific heat is 4.184 J/(g...
January 28, 2013 by Thuy

Specific Heat
How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F
November 3, 2014 by Justin

Chemistry
Sulfur burns in oxygen in two steps: i.S(s) + O2(g) ->SO2(g) change of Heat=-297kJ ii. 2SO2(g) + O2(g)->2SO3(g) change of heat=-198kJ Calculate the total heat released if this is the final reaction: 2S(s) + 3O2(g)->2SO3(g)
April 6, 2011 by Erika

physics
if 1 kilogram of ice is dropped in 9 kilogram of water at 50 degree centigrade. what will be final temperature of water. while the latent specific heat of fusion of ice is 336000 joule/kilogram
March 21, 2010 by abid naeem

chemistry
How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The question is how do you ...
February 13, 2010 by joseph

chemistry
How much heat is required to raise the temperature of 200 g CH3OH from 20 to 30 degrees and then vaporize it at 30 degrees. The molar heat capacity of CH3OH is 81.1 J/Mol/K. Okay...the answer is approximately around 254. It was a homework problem. The question is how do you ...
February 13, 2010 by joseph

Chemistry
0.0337g of a volatile liquid when vaporized completely at 100Pa and 300K occupied a volume of 20cm3. When this volume of vapor was completely burnt in an excess of oxygen, 40cm3 of carbon dioxide and 20cm3 of water vapor were formed. All volumes being measured at the same ...
February 18, 2012 by Shaun

Chemistry
Water can be heated in tightly woven baskets by dropping in hot rocks. The technique is useful for cooking in the absence of metal or pottery vessels. Estimate the size (in liters) of basket needed to hold the rocks and water if 5 L of boiling-hot (100°C) water is required. ...
September 11, 2011 by Martyna

Chemistry
Water can be heated in tightly woven baskets by dropping in hot rocks. The technique is useful for cooking in the absence of metal or pottery vessels. Estimate the size (in liters) of basket needed to hold the rocks and water if 5 L of boiling-hot (100°C) water is required. ...
September 11, 2011 by Martyna

Physics repost - need more explanation
Posted by Ceres on Wednesday, September 23, 2009 at 4:07pm. The question is: "A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. Show that the ...
September 23, 2009 by Ceres

Physics
A 3.40 kg block of copper at a temperature of 74 °C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.20 kg. When thermal equilibrium is reached the temperature of the water is 14 °C. How much ice was in the bucket before the copper block ...
April 23, 2015 by Jennifer

Physics
find the heat flow through the sides of an 25cm tall by 10cm wide of ice water in 46s.The glass is 6.00mm thick; the temperature is inside is 28 celcius, the temperature outside is 50 celcius
February 25, 2016 by Laura

Chemistry
A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J/°C · g) and a 10.00-g sample of iron pellets (specific heat capacity = 0.45 J/°C · g) are heated to 100.0°C. The mixture of hot iron and aluminum is then dropped into 91.9 g of water at 23.7°C. ...
November 13, 2011 by Bill

chemistry
A 4.90 g nugget of pure gold absorbed 255 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).
March 24, 2010 by pjl

phy111
1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
April 5, 2015 by tk

physics
1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
April 12, 2015 by promise

chemistry
An insulated beaker contains 250.0 grams of water at 25C. Exactly 41.6 g of a metal at 100.0C was dropped in the beaker. The final temperature of the water was 26.4C. Assuming that no heat is lost in any other way, calculate the specific heat of the metal.
January 21, 2012 by bob

physic
Suppose a block of lead of mass 0.4kg at temperature of 95°C is dropped in 2kg of water originally at 20°C in a container. Calculate the final temprereture if no heat is lost to the container and enviroment ;(specific heat of lead is 128j/kg°C and water ;4184j/kg°C
March 27, 2017 by stanis frank

Meteorology
the specific heat of ice is 0.5 cal/g degrees c. which will require more heat: heating 100g of ice to 20 degrees c, or heating 100g of liquid water to 20 degrees c?
April 20, 2016 by Kelsie

AP Chem
I missed a lab in class a week ago and had to make it up just the other day. My teacher didn't have time to explain the lab to me, so he gave me a brief overview of the procedure. The objective of the lab was to calculate the specific heat of an unknown block of metal. The ...
February 8, 2007 by Jess

Chem
Bromine melts at -7.25 degree C and boils at 58.8 degree C. The enthalpy of fusion of bromine is 10.57 kJ/mol and the enthalpy of vaporization of bromine is 29.96 kJ/mol. The specific heat of liquid bromine is 0.474 J/g∙K. How much heat, in kJ, is required to convert 25....
September 2, 2011 by Maegan

chemistry
How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
December 8, 2008 by Linda

chemistry
How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
December 8, 2008 by Linda

Chemistry - Melting Ice
The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g of ice.
November 29, 2012 by Jayden

physics practical investigation
design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn.hint...you may investigate either the amount of heat produced or the amount of gas produced(make choice...
March 25, 2013 by Jossie

Chemistry
50 grams of water at 85ºC were passed through one side of a two-compartment heat exchanger. Sixty-five grams of 30ºC were passed through the other side. Both streams of water came out at 50ºC Calculate the amount of heat given up by the hot water and the amount absorbed by ...
March 13, 2013 by Sarcasticqueen

PHY 113
1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
April 13, 2015 by Austin

physics
Why does water freezing not violate the second law of thermodynamics? (Hint: Think in terms of a system) The entropy of the water decreases when it freezes and goes into a more ordered crystaline state. However, heat is released to the environment in the process. If the ...
February 19, 2007 by anonymous

Chem
Temperature of Bunsen Burner Flame: h t t p s : / / mashchemistry . wikispace s . com /file/ view/Temperature +of+a+ Bunsen+Burner+Flame ... p d f (couldn't put the link so I spaced it out) My data Table: Type of metal used: Cu Mass of metal object: 75.4 g Sp.ht of metal ...
March 1, 2017 by Emma

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we write each...
November 8, 2015 by Justin

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we write each...
November 8, 2015 by Justin

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we write each...
November 8, 2015 by Justin

Chemistry
An experiment being conducted, the pressure is 0.9 atm and the temperature is 18 ° C. One of the steps of experience requires the combustion of 500 ml of ethanol (d = 0.78 g / ml). Whereas the burning this amount of ethanol does not significantly alter the enviroments ...
January 21, 2016 by Kennia

Chemistry
An experiment being conducted, the pressure is 0.9 atm and the temperature is 18 ° C. One of the steps of experience requires the combustion of 500 ml of ethanol (d = 0.78 g / ml). Whereas the burning this amount of ethanol does not significantly alter the enviroments ...
January 22, 2016 by Kennia

physics
An unknown material has a normal melting/freezing point of -20.4 °C, and the liquid phase has a specific heat capacity of 179 J/(kg C°). One-tenth of a kilogram of the solid at -20.4 °C is put into a 0.130-kg aluminum calorimeter cup that contains 0.198 kg of glycerin. The ...
December 4, 2013 by tiana

Chemistry
Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the diffusivity of carbon...
December 6, 2012 by Andrea

chemistry
"Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the diffusivity of ...
December 7, 2012 by lisa

Chem
A chemical reaction in a bomb calormeter evolves 4.66Kj of heat. If the heat capcity of the calorimeter is 1.38 Kj/C what is the temperature change?
November 18, 2010 by Katie

Physics
A 10-kg piece of aluminum (which has a specific heat of 900 J/kg×°C) is warmed so that its temperature increases by 5.0 C°. How much heat was transferred into it?
December 19, 2010 by JJ

Integrated Physics and Chemistry
Insulating materials are rated by their.. A)specific heat B)heat index C)R-value D)temperature resistance
April 21, 2011 by Ashley!!

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. ...
September 21, 2013 by Anonymous

IPC
The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____. a) about 200 calories of heat must be added to 1 gram of ethanol to change its temperature b) about 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a ...
October 26, 2010 by Jon

ap chemistry
When 0.515 g of compound X is burned completely in a bomb calorimeter containing 3000 g of water, a temperature rise of 0.243◦C is observed. What is Urxn for the combustion of compound X? The hardware component of the calorimeter has a heat capacity of 3.12kJ/◦C. ...
October 22, 2013 by gabriella

Chemistry
A piece of copper of mass 21.3 g at 106.0 °C is placed in a vessel of negligible heat capacity but containing 53.0 g of water at 19.3 °C. Calculate the final temperature of the water. I keep getting 22 celsius and I'm not sure where I'm going wrong. I plug it into the ...
November 4, 2014 by Jessica

Heat and Molar Mass
An aqueous solution containing 34.6 g of an unknown molecular nonelectrolyte compound in 142.0 g of water was found to have a freezing point of 1.2 degrees C. Calculate the molar mass. A sample of steam with a mass of 0.553 g and at a temperature of 100 degrees C condenses ...
January 15, 2013 by Amy

Chemistry
Determine the final temperature of water if 17.6 kJ of heat is added to 350 g of water initially at a temperature of 24.10 C. (specific heat of water is 4.184 Jg^-1K^-1)
March 18, 2017 by Anonomous

Chemistry
Determine the final temperature of water if 17.6 kJ of heat is added to 350 g of water initially at a temperature of 24.10 C. (specific heat of water is 4.184 Jg^-1K^-1)
March 21, 2017 by Anonomous

chem question
This is on a practise exam I have and I cant get part of it, I don't know if it is not only due to my not understanding but to the fact that the first two parts might be wrong. Thanks for your help if you can. Heres the question: A coffee-cup calorimeter normally consists of ...
June 20, 2006 by Natalie

physics practical investigation
design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn..guidance/hint...you may investigate either the amount of heat produced or the amount of gas produced(...
March 25, 2013 by Jossie

phy
How much heat is required to raise the body temperature of a 60.0-kg woman from 37.0° C to 38.2° C?
April 17, 2013 by jessica

Chemistry
How many joules of heat are required to raise the temperature of 550 g of water from 12°C to 18°C
July 28, 2015 by Dilcia

Chemistry
An insulated beaker contains 250g of water at 25 degrees celsius. Exactly 41.6g of a metal at 100 degrees celsius was dropped in the beaker. The final temperature of the water was 26.4 degrees celsius. Assuming that no heat is lost in any other way, calculate the specific heat...
January 22, 2012 by Hannah

chemistry
if heat was added at a constant rate to the solid subsance, why did the temperature remain at 16 degree C for approximately 6 minutes?
October 4, 2010 by amanda

chemistry
Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example, continents). Use your knowledge of heat energy, specific ...
May 15, 2013 by jader

Clark Atlanta
Plants need carbon dioxide to produce energy. How many carbon are there in 10.0 g of carbon dioxide? this is what I have so far. 10.0g x 1mol/44.01CO2 = 227 mol CO2
October 26, 2014 by Ashley

chem 101
This is second part is built off the first question. These are all from a practice test. How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F? correct answer: 279kj How much alcohol must be burned to generate enough heat to ...
April 15, 2012 by Anonymous

heat transfer
a plane wall of thickness 10 cm and thermal conductivity of 25w/m degree centigrade has a volumetric heat generation of.3*10 to the power 16w/mque .the wall is insulated on one side & other side is exposed to fluid at90 degree temperature . determine maximum temperature in ...
July 24, 2013 by sushil

Chemistry
A 19.3L expandible container is filled in a room where the pressure is 761mmHg. It is filled with 600.4mmHg nitrogen, 108mmHg oxygen, 32.1 mmHg water vapor. The rest of the pressure is made up by carbon dioxide. The temperature is 20.3°C a. What is the partial pressure of ...
September 26, 2016 by Anonymous

Chemistry
A 19.3L expandible container is filled in a room where the pressure is 761mmHg. It is filled with 600.4mmHg nitrogen, 108mmHg oxygen, 32.1 mmHg water vapor. The rest of the pressure is made up by carbon dioxide. The temperature is 20.3°C a. What is the partial pressure of ...
September 27, 2016 by Anonymous

Chemistry
If 395 grams of water at 21 Celsius absorbs 285kJ of heat from a mountain climbers stove at an elevation where the boiling point of water is 87 Celsius, is this amount of energy sufficient to heat the water to its boiling point? How many kJ are required to boil the water?
November 6, 2011 by Kay

physics
When a lead bullet hits a solid target at high speed, its entire kinetic energy is converted into heat. For simplicity, assume that all the heat is concentrated in the bullet rather than the target. If the bullet's initial temp. is 20` C, how fast should it be moving before ...
February 19, 2010 by elisabeth

Physical Science
How much heat is needed to melt a sample of ice if the temperature of 150 g of water in the calorimeter is lowered from 23.0 C to 0 C?
April 3, 2012 by Malise

chemistry
A propane barbeque is used to heat up 400g of water in an aluminum pot until it is boiling. Using the following information, calculate the molar enthalpy of propane. You can assume the temperature of the water and the temperature of the aluminum pot are always the same. ...
November 7, 2010 by Bob

chemistry
When 0.572 g of compound X is burned completely in a bomb calorimeter containing 3000 g of water, a temperature rise of 0.461 ◦ C is observed. What is ∆Urxn for the combustion of compound X? The hardware component of the calorimeter has a heat capacity of 3.75 kJ...
October 2, 2012 by Austin

Chemistry
What quantity of heat is required to convert 200g of ice at 0.00C into water at 50C? I know that im suppose to use the E=mc(Delta T) but im not sure how...
July 17, 2014 by Alex

Chemistry
When 0.643 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 105C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
May 7, 2007 by Jared

CHM1045
NH4NO3(s) right arrow NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction, 1.21 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid dissolves) is 22....
March 30, 2013 by Philip Golden

science - chemistry
Some heat is supplied to a mixture of ice and liquid water in a closed container and the contents of the container are thoroughly mixed. If, after the addition of heat, both ice and liquid water remain: A) the temperature of the system will increase B) the vapor pressure will ...
December 27, 2010 by S

Chemistry
The specific heat of zinc is 0.096 cal/(g °C). Determine the energy required to raise the temperature of 26.1 g of zinc from room temperature (20.0 °C) to 150 °C.
April 3, 2013 by B

Chem
The specific heat of zinc is 0.096 cal/(g °C). Determine the energy required to raise the temperature of 26.1 g of zinc from room temperature (20.0 °C) to 150 °C.
April 4, 2013 by Joel

science HELP
the amount of heat gained or lost by a substance is equal to the product of its heat capacity times the change in temperaturetimes its _____________
April 22, 2008 by sam

Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will require 721.5 calories ...
March 12, 2012 by Tracy

Chemistry Help!
calculate the specific heat of a metallic element if 314 joules of energy are needed to raise the teperature of a 50.0g sample from 25C to 50C. i'm not sure if you use the Q=(s)(m)(delta t) equation or not since it asks for the specific heat not the specific heat capacity.. i ...
June 6, 2010 by Ashley

IPC(integrated phsyics)
Insulating materials are rated by their _____. specific heat heat index R-value temperature resistance
November 29, 2010 by lana

  1. Pages:
  2. <<Prev
  3. 7
  4. 8
  5. 9
  6. 10
  7. 11
  8. 12
  9. 13
  10. 14
  11. 15
  12. 16
  13. 17
  14. 18
  15. 19
  16. 20
  17. 21
  18. Next>>

Post a New Question