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July 31, 2015

Search: Calculate the amount of heat (in kJ) required to convert 87.5 g of water to steam at 100°C.

Number of results: 68,367

physics
Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00◦C.
July 5, 2011 by angel

chemistry
How much heat (in g ) is evolved in converting 1.00 of steam at 145.0 to ice at -45.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
August 27, 2010 by sara

chemistry
How much heat (in ) is evolved in converting 1.00 of steam at 150.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
July 10, 2011 by hannah

chemistry
How much heat (in ) is evolved in converting 1.00 of steam at 150.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 .
July 10, 2011 by hannah

Chemistry
Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?
November 20, 2011 by Devin Boutte

Chemistry
Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?
November 20, 2011 by Devin Boutte

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 ...
October 23, 2010 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 ...
October 23, 2010 by Nardos

physics
A heat transfer of 8.7 multiplied by 105 J is required to convert a block of ice at -12C to water at 12C. What was the mass of the block of ice?
November 22, 2008 by lyd

PLEASE HELP ME IN THIS PHYSICS PROBLEM
A heat transfer of 9.5 x 10^5 J is required to convert a block of ice at -15C to water at 15C. What is the mass of the block of ice?
January 14, 2013 by JOHN

chemistry
The problem statement, all variables and given/known data When 5.00 g of NaOH(s) are added to 100 g of water using a calorimeter (with Cp = 493.24 J/K), the temperature rises from 25.0 to 37.5 C. Calculate the molar heat of solution. NaOH(s)--->Na(aq)+OH(aq) Assume that ...
November 14, 2012 by fufi

physic-heat
the specific heat of water is one of the highest of all substances.why does this make water a useful liquid to use in hot water bottles? and could you use a lump of nickel to warm your bed instead of a hot water bottle?which would be better? why? I will be happy to crititque ...
April 8, 2007 by Pauline

chemistry
How many calories does it take to convert 22 grams of liquid water with a temperature of 48 degrees C to steam?
November 4, 2010 by Rachel

Chemistry
Hey, for chemistry class we are given days in the lab to conduct an experiment, then answer a number of questions that correlate with that experiment and how we can make use of it. This week we looked at the Molar Fusion of Ice and there are some questions i don't quite ...
December 15, 2008 by Cody

physics
how many gram of ice at 0 c can be melted by the heat released when one gram of steam condense to water at 100 c check my answer please and you deman i am sorry by accident i post it the previous question solution Qcold=-Qhot MLf(ice)=-MlV(water) Mice = -(-0.001*2256000)/(...
April 27, 2014 by Mohanad

Chemistry
A 5.80 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 3.40 kg of water. The initial temperature of the water was 14.10C. At the end of the reaction, the temperature of the water was 48.90C. Assume the heat was completely absorbed ...
March 8, 2010 by Megan

Gonzaga
Calculate the amount of heat released when 65.6 g of water at 55.5C cools to ice at 0.0C.
September 22, 2014 by Brendan

physics
how much heat is required to change 400g of ice at -20c into steam at 120c
October 6, 2010 by steve

chemistry
What mass of steam is required to release 4.36 105 kJ of heat energy on condensation? answer in unit of g.
December 1, 2011 by Anonymous

Chemistry! Please Help!
My teacher provided info about a worksheet of problems. Special Heat of water: 4.184 Special Heat of Steam: 2.09 Special Heat of Ice: 1.8 Based on this info, and the notes we have taken on phase changes, we are supposed to find out how much energy is needed to change certain ...
February 14, 2008 by Meg

chemistry
An insulated beaker contains 250.0 grams of water at 25oC. Exactly 41.6 g of a metal at 100.0oC was dropped in the beaker. The final temperature of the water was 26.4oC. Assuming that no heat is lost in any other way, calculate the specific heat of the metal. a. 0.159 J g-1 K-...
January 21, 2012 by utna

Chemistry
Assuming that the specific heat of the solution is 4.18 J/(g⋅∘C) and that the calorimeter itself absorbs a negligible amount of heat, calculate ΔH in kilojoules for the reaction CaO(s)+H2O(l)→Ca(OH)2(aq) When 1.045 g of CaO is added to 50.0 mL of water ...
April 20, 2014 by Tyler

Lauren
The amount of heat required to raise temperature of 55.85 g of iron 1 degrees C is called its A. Change of energy B. Enthalpy C. Molar heat capacity D. Specific heat capacity E. Specific Heat.
November 16, 2007 by Chemistry

chemistry
1. a) 50ml of water at 46.9C were mixed with 50ml of water at 25.1C in a calorimeter also at 25.1C. The final temperature was 30.1C. Assuming that neither the density of water nor its specific heat capacity change with temperature, calculate the total heat capacity of the ...
November 12, 2012 by Cicily

Chemistry
A sample of steam with a mass of 0.550 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 25, 2012 by Becca

physics(heat)
a mixture of 250g of water and 200g of ice at 0deg C is kept in a calorimeter which has a water equivalent of 50g. if 200g of steam at 100deg C is passed through this mixture, calculate the final temperature and the mass of contents of the calorimeter. ans 572.22g please ...
May 29, 2012 by ridhi

Chemistry
Calculate the amount of heat required to raise the temperature of 3 moles of oxygen gas from 298 to 400K. Given that C, of O2 is 29.36 Jmole-'K-'. Please show how to do it.
January 18, 2013 by Dermot

chemisty
The molar heat capacity of C6H6(ℓ) is 136 J/mol ◦C and of C6H6(g) is 81.6 J/mol ◦C. The molar heat of fusion for benzene is 9.92 kJ/mol and its molar heat of vaporization is 30.8 kJ/mol. The melting point of benzene is 5.5 ◦C, its boiling point is 80...
January 11, 2012 by bob

chemistry
How much heat is required to warm 250.4 g of water from 22.6 C to 75.8 C given that the specific heat capacity of water is 4.184 J/gx degrees C?
November 3, 2011 by Teresa

chem
How much energy (in Joules) is required to heat 13.48 g of water from 10.5 oC to 46.2 oC ? Use 4.184 J/goC as the specific heat capacity of water.
March 26, 2012 by emily

CHEM
A 5.00 g sample of Al pellets (specific heat = .89 J/g degrees c) and a 10.00 g sample of Fe pellets (specific heat = .45 J/g degrees c) are heated to 100.0 degrees C. The mixture of hot Fe and Al is then dropped into 97.3 g of water at 22.0 degrees C. Calculate the final temp...
October 1, 2007 by Charlie

Physics HELP PLEASE
If 10-kg of ice at 0 degrees Celsius is added to 2-kg of steam at 100 degrees Celsius, the temperature of the resulting mixture is? Use Joules. ANSWER: 40 Specific Heats: Ice = 2060 Steam = 2020 Latent Heats: Water melting = 3.33x10^5 Water boiling = 2.26x10^6
February 11, 2013 by Max

chemistry
how much heat is required to completely vapporize 2.3 grams of ice starting at -50 degrees Celsius? (the specific heat of ice is 2.0 J/g.C; the specific heat of water is 4.184 J/g.C; the heat of fusion is 333 J/g; and the heat of vaporization is 22601 J/g)
March 22, 2011 by Anonymous

science
"How many calories of heat are required to raise the temperature of 650 g of water from 13.0C to 20.0C? (Heat of water is 1.00cal/g X C) "
April 3, 2011 by sharon

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

Chemistry
In which case is heat involved: mixing 100.0-g samples of 90'C water and 80'C water or mixing 100.0-g samples of 60'C water? assume no heat is lost to the environment. please help thanks.
April 14, 2013 by Perrie E.

chemistry
A 115 g piece of metal, initially at 60.0 C, is submerged into 100.0 g of water at 25.0 C. At thermal equilibrium, this mixture had a final temperature of 27.0 C. The specific heat capacity of water is 4.18 (J/gC). Use this information to determine the specific heat ...
March 1, 2013 by Brandi

Chemistry
When a vehicle is parked in the sunlight on a hot summer day, the temperature inside can approach 55 deg C. one company has patented a non-CFC propelled aerosol that can be sprayed inside a vehicle to reduce the temperature to 25 deg C within seconds. the spray contains a ...
November 20, 2010 by Rayana

Chemistry
When a vehicle is parked in the sunlight on a hot summer day, the temperature inside can approach 55 deg C. one company has patented a non-CFC propelled aerosol that can be sprayed inside a vehicle to reduce the temperature to 25 deg C within seconds. the spray contains a ...
November 21, 2010 by Rayana

Chemistry
How much energy (in kilojoules) is released when 12.8 g of steam at 130.0 C is condensed to give liquid water at 73.5 C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K*Mol)for the liquid and 33.6 J/(K*Mol) for the vapor.
January 24, 2011 by Kevin

chemistry
How much energy (in kilojoules) is released when 12.3g of steam at 121.5degree C is condensed to give liquid water at 64.5 degree C? The heat of vaporization of liquid water is 40.67 kj/mol, and the molar heat capacity is 75.3 J/(K mol) for the liquid and 33.6 J/(K mol) for ...
January 25, 2010 by Lauren

Physics
In one of your rigorous workout sessions, you lost 140 g of water through evaporation. Assume that the amount of work done by your body was 3.8 105 J and that the heat required to evaporate the water came from your body. (a) Find the loss in internal energy of your body (due ...
December 8, 2014 by Anonymous

Physics
Which would burn the most 100 g of water at 100 degrees C or 100 g of steam at 100 degrees C?
February 20, 2011 by Sophia

Chemistry
calculate the amount of energy required to vaporize 43.0g of water at its boiling point
February 28, 2013 by Richie

Chemistry
a. Exactly 4.000 mol of NH3 is burned in a constant volume (bomb) calorimeter immersed into 100.0kg of water. The temperature of water increases by 3.619 degrees C after the reaction. Calculate the heat released by the reaction. Neglect the heat capacity of the bomb and the ...
March 18, 2012 by Wendy

chemistry
If 100. g of iron at 100.0 C is placed in 200. g of water at 20.0 C in an insulated container, what will the temp, C, of the iron and the water ( C value is 4.18) when both are at the same temp? The specific heat of iron is 0.444 KJ/Kg C ---- steps would be appreciated... ...
September 15, 2006 by Lily

physics
The pressure in a constant-volume gas thermometer is 0.700atm at 100 deg. Celsius and 0.512atm at 0 deg. Celsius. a) What is the temperature when the pressure is 0.0550atm? b)What is the pressure at 500 deg. Celsius?
December 2, 2008 by Becky

chemistry
We calculated that 30.0 grams of ice initially at -10.0 Celsius and it requires 23.1 kj of energy to bring it all the way to a boil. How much additional energy does it take to convert all of the water to steam at 100 degree Celsius? How does this compare to what we calculated ...
May 4, 2014 by mai

Chemistry
What is the minimum amount of ice (at 0 degress C) that must be added to 250mL of water at 23 degrees C in order to cool it to 0 degrees celsius? (Density of water= .98 g/cm^3; heat of fusion= 333J/g; heat capacity of water= 4.184J/g C; and heat capacity of ice= 1.86 J/g C)
April 3, 2011 by Kayla

Chemistry
Please Help!! Using heat of fusion, Specific heat, or heat of evaporation. Calories to condense 135g of steam at 100 degrees C and to cool the liquid to 15 degrees C. This is how I calculated it using heat of evaporation: 135gx540 cal=72900cal 72900cal/135g x (delta T)85 ...
May 15, 2012 by Anonymous

Chemistry (heat flow, simple)
Well I know to calculate heat flow you use, q=ms delta t. for this experiment we mixed naoh with hcl into water. the total mass (volume) of the mixture was 100g the temperature change for naoh was 11.7 degrees C and for hcl it was 11.8 degrees C now im looking to calculate ...
March 12, 2010 by Abdullah

10th geade Chem
Does anyone know how much heat do I need to convert 95g. of ice at -25 C. to water at 30 C. the heat capacity of H2O(s) is 2.1 J/g*C.
February 28, 2011 by diana

chemistry
calculate the amount of heat necessary ti raise the temperature of 8.5kg of water from 12.5 to 84 degrees C
May 4, 2010 by Quentin

chemistry
HELPPPP!!!! This is a lab, and i need help with the equations please!! Thank you !! Heat of fusion data table : Mass of foam cup = 3.57g Mass of foam cup + warm water = 104.58g Mass of foam cup + warm water + melted ice = 129.1g Temperature of warm water = 37 degrees celcius. ...
December 2, 2012 by maryam

chemistry
The heat of vaporization of water is 40 kJ mol-1 at 100oC. What percentage of the heat supplied to vaporize the water can be converted into work if the water is vaporized at 100 degrees C against a constant pressure of 1 atm?
November 8, 2011 by nath

Physics
A cylindrical copper rod of length 1.20 m and cross-sectional area 5.60 cm^2 is insulated to prevent heat loss through its surface. The ends are maintained at a temperature difference of 100 degrees C by having one end in a water-ice mixture and the other in boiling water and ...
September 23, 2013 by cm

Chemistry
If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58C to 35.82C. Calculate the heat capacity of the calorimeter (in J/C). The specific heat of water is 4.184
June 18, 2014 by Anonymous

Chemistry
Calculate the heat released when 10.0 g of water at 25.0C cools to ice at 0.0C. The specific heat of water is 1.00 cal/(g C); the heat of fusion is 80.0 cal/g; and the heat of vaporization is 540.0 cal/g.
April 17, 2010 by helpanderson

geometry
Two angles of a quadrilateral measure 210 and 100. The other two angles are in a ratio of 2:3. What are the measures of those two angles? I know the four angles add to 360 deg. So the two unknowns are 50 deg together. 20 and 30 deg angles would give a ratio of 2:3, but what ...
April 21, 2011 by Leilani

AP Chemistry
The molar heat of fusion for water is 6.01 kJ/mol. The heat capacity for water is 75 J/mol deg. Which expression gives the quantity of energy need to change 1.0 mol ice at 0C to liquid water at 25C? A. 6010/(75x25) B. 6.01+75 C. 6010+(75x25) D. 6010/298+(75x25) E. (6010+(75x25...
September 23, 2012 by Eric

chemistry
1(a) when 25.0ml of 0.500 mol.dm3 H2SO4(AQ) SOLUTION IS added to 0.025dm3 of 1.00 moldm3 KOH SOLUTION , THE TEMPERATURE OF THE REACTION MIXTURE RISES FROM 23.50 CELCIUS TO 30.17 CELCIUS . THE SPECIFIC HEAT CAPACITY AND DENSITY OF WATER 4.20j.g.celcius and 1.00 g.cm. the ...
February 9, 2012 by mustafe

science
When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these solutions, however, are higher...
May 12, 2010 by kayci

Chemistry
80.0 mL of water is initially at room temperature (22degrees C). A chilled steel rod at 2 degrees C is placed in the water. If the final temperature of the system is 21.2 degrees C, what is the mass of the steel bar? Specific heat of water = 4.18J/g(degreesC) Specific heat of ...
October 22, 2010 by Ellen

Science-Chemistry
A 5.00 g sample of Al pellets (specific heat = .89 J/g degrees c) and a 10.00 g sample of Fe pellets (specific heat = .45 J/g degrees c) are heated to 100.0 degrees C. The mixture of hot Fe and Al is then dropped into 97.3 g of water at 22.0 degrees C. Calculate the final temp...
October 1, 2007 by Niclas

chemistry
calculate the amunt of heat required to completely boil 250g of water starting from room temp 22 degrees C
December 6, 2011 by Monique

CHEM
You have a bottle of water. The water has a mass of 29 grams. You heat the water with 102 calories of heat and the final temperature of the water is 43C. What was the initial temperature (in Celsius) of the water before you added the heat? The specific heat of water is 1 ...
May 24, 2015 by Anonymous

college chemistry
How many calories are required to change 259 g of ice at 0 C to steam at 100 C?
May 26, 2015 by Mark

Chemistry
Determine the resulting temperature when 150 g of ice at 0 deg.C is mixed with 300 g of water at 50 deg C.
February 23, 2010 by Stacie

CHEM
A 5.00 g sample of Al pellets (specific heat = .89 J/g degrees c) and a 10.00 g sample of Fe pellets (specific heat = .45 J/g degrees c) are heated to 100.0 degrees C. The mixture of hot Fe and Al is then dropped into 97.3 g of water at 22.0 degrees C. Calculate the final temp...
October 1, 2007 by Charlie

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 100.0C. The mixture of hot iron and aluminum is then dropped into 91.9 g of water at 23.7C. Calculate the ...
November 13, 2011 by Bill

chemistry thermodynamics
calculate the w, q, delta H, and delta U for the process in which 1 mol of liquid water at 373 K undergoes the transition to gas phase water at 406 L. the volume of liquid water at 373K is .98 x 10^-5 m^3/mol and the volume of steam at 373 and 460 K is 3.03 x 10^-2 and 3.74x ...
February 28, 2011 by romell

Chemistry
Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc delta...
March 7, 2011 by Selena

physical chemistry
1.) Calculate delta rH for the freezing of water at one bar and -10 degrees C. The heat capacities are H2O(s)=36.9 JK-1mol-1 and H2O(l)=74.5JK-1mol-1. delta H for freezing of water at 0 degree C is -6602Jmol-1 (assume C is independent of temperature). 2.) Assume the hot brick ...
February 21, 2012 by nicole

physics
In lab you submerge 100 g of 41 degree Celcius iron nails in 100 g of 25 degree Celcius water (the specific heat of iron is 0.12 cal/g degrees Celcius) A)Equate the heat gained by the water to the heat lost by the nails and find the final temperature of the water. B)Your lab ...
April 3, 2012 by christy

chemistry
calculate the heat energy required to raise the temperature of a 500. gram iron pipe from 25 degress celcius to 100 degrees celcius. the specific heat for iron is .45 J/g degrees celcius
May 12, 2013 by andrea

Chemistry
When a 5.50g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee cup calorimeter, the temperature of rises from 21.6 degrees C to 37.8 degrees C. Calculate Change of heat for the reaction in kJ (also in kJ/mol NaOH) for the solution process. Assume the ...
October 10, 2011 by Jennifer

Chemistry
How much energy does it take to convert 750 grams of ice at 0 degrees Celsius to liquid water at 40 degrees Celsius? (Specific Heat of water = 4.18 J/g*C and the heat of fusion = 334 J/g)
May 10, 2012 by Morgan Chemistry

chemistry
In a household radiator, 1000 g of steam at 100 C condenses. How much heat is released?
February 12, 2013 by G

chemistry
how many kilocalories of heat are released when 85g steam at 100 degrees C converted to ice at 0.
January 30, 2014 by Anonymous

physics
if you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in calories and joules)
January 28, 2010 by maria

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
a 5.00g sample of Al pellets (specific heat=0.89J/oC*g) and a 10.00g sample of Fe pellets (specific heat=0.45J/oC*g) are heated to 100.0oC. The mixture of hot iron Al is then dropped into 92.1g of water at 21.8oC. Calculate final temp of metal and water mixture, assuming no ...
November 6, 2007 by Rebekah

chemistry
An insulated beaker contains 250.0 grams of water at 25oC. Exactly 41.6 g of a metal at 100.0oC was dropped in the beaker. The final temperature of the water was 26.4oC. Assuming that no heat is lost in any other way, calculate the specific heat of the metal. a. 0.159 J g-1 K...
January 22, 2012 by utna

chemistry calculations
At 25 deg C, Kc is 5.84x10-3 for the dissociation of dinitrogen tetraoxide to nitrogen dioxide. N2O4(g) ==== 2NO2(g) a) Calculate the equilibrium concentration of both gases when 4.00 grams of N2O4 is placed at 2.00-liter flask at 25 deg C. b) What will be the new equilibrium ...
August 30, 2014 by =)

physics
The same amount of heat entering identical masses of different substances produces different temperature changes. Calculate the final temperature when 1.25 kcal of heat enters 1.25 kg of the following, originally at 20.0C. (a) water (b) concrete (c) steel (d) mercury
July 19, 2013 by Eric

math
how much heat would be required to warm Earths ocean by 1.0 degrees C assuming that the volume is 137*10^7 km ^3 and the density of sea water is 1.03 g/cm 3. also assume that the heat capacity of seawater is the same as that of water
January 24, 2011 by marie

dr bob
how much heat would be required to warm Earths ocean by 1.0 degrees C assuming that the volume is 137*10^7 km ^3 and the density of sea water is 1.03 g/cm 3. also assume that the heat capacity of seawater is the same as that of water
January 24, 2011 by marie

Chemistry
What will be the final temperature of the water in an insulated container as the result of passing 6.00g of steam at 100.0 degrees Celsius into 100.0g of water at 24.0 degrees Celsius?
January 27, 2011 by Jason

HEAT TRANSFER
The door of a domestic refrigerates has an area of 1.7 m2 & it basically consists of a thin metal sheet with a 25 mm thick layer of insulation on the inside. The thermal conductivity of this insulation is 0.25 W / m-deg & heat transfer on each side of the door is 10 W / m2-deg...
August 1, 2012 by SIDDIQUE

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?
September 24, 2010 by Sarah

Physics
An electrical generating plant operates at a boiler temperature of 220 deg C and exhausts the unused heat into a nearby river at 18 deg C. what is the maximum theoretical efficiency of the plant?
November 19, 2012 by R

chemistry
KCl(s) → K+(aq) + Cl‾ (aq) Solid KCl dissolves as shown in the above equation. A 6.60 g sample of KCl was dissolved in 42.3 g of water. The initial temperature of the water was 21.90C. After the compound dissolved, the temperature of the water was 10.20C. Assume ...
September 26, 2012 by sam

chemistry
How much energy (in kilojoules) is released when 12.3g of steam at 121.5 degree C is condensed to give liquid water at 64.5 degree C? The heat of vaporization of liquid water is 40.67kj/mol , and the molar heat capacity is 75.3 J/(K mol) for the liquid and 33.6 J/(K mol)for ...
January 20, 2010 by aamani

chemistry
How much energy (in kilojoules) is released when 12.3g of steam at 121.5 degree C is condensed to give liquid water at 64.5 degree C? The heat of vaporization of liquid water is 40.67kj/mol , and the molar heat capacity is 75.3 J/(K mol) for the liquid and 33.6 J/(K mol)for ...
January 20, 2010 by Lauren

physics
135.2 J of heat energy are transferred to 24.75 g of mercury. By how much does the temperature increase? (in K) Specific heat of the mercury is 140 J/kgC. How much heat is needed to raise the temperature of 24.75 g of water by the same amount? Specific heat of the water is ...
November 14, 2014 by sunshine

physics
A 0.200 kg block of ice at 15C is placed into a pan on a stove, heated to a liquid, and then to vapour with a final temperature of 115C. Calculate the total amount of heat required for this process.
June 3, 2012 by shan

chemistry
How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C? The heat of vaporization of liquid water is 40.67 kJ/mol and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6 J?(K*mol) for the vapor.
January 24, 2012 by Becca

Chemistry
Calculate the heat in kilojoules needed to vaporize 8.00kg of water at 100∘C.
February 18, 2014 by Jacqueline

chemistry
LP gas burns according to the exothermic reaction: C3H8(g) + 5 O2(g) right arrow 3 CO2(g) + 4 H2O(g) ΔHrxn = −2044 kJ What mass of LP gas is necessary to heat 1.2 L of water from room temperature (25.0C) to boiling (100.0C)? Assume that during heating, 18% of ...
March 30, 2013 by Dr. Phil

chemistry
dissolving 4.022 g of a salt in 100 mL of water changes temperature by -1.2^oC: what is the heat absorbed? The specific heat of water is 4.184 J/(g*C)
March 28, 2015 by Bob

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