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April 18, 2014

Search: A sample of 1.00 mol H20 is condensed isothermally and reversibly to liquid water at 100C

Number of results: 56,944

chemistry
A sample of 1.00 mol H2O(g) is condensed isothermally and reversibly to liquid water at 100C. The standard enthalpy of vaporization of water at 100C is 40.656 kJ mol−1. Find w, q, ∆U, and ∆H for this process. ------------- I can solve for ∆H: n * ...
Thursday, February 5, 2009 at 12:01am by chemstudent

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.
Monday, January 24, 2011 at 10:24pm 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 ...
Monday, January 25, 2010 at 9:05pm by Lauren

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 ...
Wednesday, January 20, 2010 at 7:32pm 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 ...
Wednesday, January 20, 2010 at 8:29pm by Lauren

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.
Tuesday, January 24, 2012 at 12:52pm by Becca

Chemistry
Using the molar masses of hydrogen and oxygen, you can discover your limiting reactant (the reactant that would produce the least water). The water produced by your limiting reactant would be the amount of water formed. (2.4 g H)(1 mol H/1.008 g)(1 mol H20/2 mol H)=1.19 mol ...
Saturday, November 9, 2013 at 7:55pm by Olivia

Chemistry
1.) A vapor volume of 1.17 L forms when a sample of liquid CH3CN absorbs 1.00 KJ of heat at its normal boiling point (81.1 C and 1 atm). What is the heat of vaporization in KJ per moles of CH3CN? 2.) The vapor pressure of water at 25 C is 23.76 torr. If a 1.25 g sample of H20 ...
Monday, February 15, 2010 at 7:36am by joseph

Chemistry
The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol K. The conversion of 50.0 g of ice at 0.00C to liquid water at 22.0C requires how much kJ of heat? Can someone explain how to do this, I tried but keep getting the wrong answer.
Monday, September 20, 2010 at 8:09pm by Anonymous

Chemistry
The heat capacity of liquid water is 4.18 J/gC and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67C into 1.00 g of steam at 100C?
Sunday, November 13, 2011 at 9:36pm by Sue

AP Chemistry
A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This process removes all ...
Wednesday, September 26, 2012 at 9:39pm by Jack

chemistry
I have a molar mass for a condensed vapor: 95.935 g/mol. What are a few of the potential identities of the unknown liquid from which the condensed vapor came from?
Thursday, April 1, 2010 at 12:03am by Hannah

Physical Chemistry2
One mole of a van der Waals gas with a=15.0 l^2 atm mol^−2 and b=0.015 l mol^−1 is expanded reversibly and isothermally from 1 atm to 0.5 atm at a temperature of 300 K. Calculate w for this process, and compare it with that required to expand an ideal gas between ...
Monday, September 29, 2008 at 3:57pm by Amber

chemistry
How much energy (in kilojoules) is released when 12.3 of steam at 121.5 is condensed to give liquid water at 64.5? The heat of vaporization of liquid water is 40.67 , and the molar heat capacity is 75.3 for the liquid and 33.6 for the vapor.
Wednesday, January 20, 2010 at 7:10pm by aamani

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
Steam is compressed reversibly to liquid water at the boiling point 100C. The heat of vaporisation of water at 100C and 1.01325 bar is 2258Jg^-1. Calculate for one mole of water in term of work done(w),q,H and U for the process
Sunday, April 8, 2012 at 12:55pm by Charles

chemistry
3.5 moles of steam at 100 C are condensed at 100 C and the resulting water is cooled to 42.3 C. Calculate the entropy change for this process.(The molar heat capacity of liquid water is 75.3 J mol1 K1, and the molar enthalpy of vaporisation of water is 40.8 kJ mol/1 at 100 C).
Friday, December 30, 2011 at 6:31am by baranse

chemistry
A 0.90g sample of liquid water was introduced into an evacuated 2.00 L flask, which was then sealed and heated to 37 (degree)C. What percentage, by mass, of the water remained as liquid? [Vapor pressure of water at 37 (degree)C=48.2 torr]
Wednesday, June 23, 2010 at 2:19pm by Jim

Chemistry
H2O (liquid) yields H2O gas delta H= +44kJ. How much heat is evolved when 9.0 grams of water vapor is condensed to liquid water?
Monday, November 15, 2010 at 6:10pm by Katelyn

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
Hey i have an idea how to do this but am not sure could you please help and show work. 12 moles of a gas sample at an initial temperature of 12 degrees celcius at a pressure of 200 Pa is allowed to expand isothermally and reversibly against a pressure of 50 kPa. Calculate the ...
Friday, January 18, 2013 at 4:11am by Dermot

chemistry
n = (pv)/ (RT) = (187.5 * 2.50) / (62.4 * 338) = 0.0222 mol H20 0.0222 mol H20 * 18.02g/mol = 0.4 g H20 vaporized
Wednesday, September 21, 2011 at 10:08am by sarah

Chemistry
One mole of nirtogen at 273K occupying 10 litres (state 1) is to be expanded to a volume of 20 litres at 373K (state 2). An infinite number of paths from state 1 to state 2 are possible. Consider the following important paths: (a) The gas is expanded isothermally and ...
Thursday, January 8, 2009 at 7:26am by Alice

chemistry
calculate3 the concentrationof chloride in water sample Mw using this equation mol Ag+ = 1= MxVwx10-3 = MxVw mol Cl- 1 Mwx20.00x10-3 Mwx20 so M x Vw=Mw x20 or Mw= M x Vw 20 Mw= ? mol/L chloride in water sample= ? mmol/L Mw=? g/L chloride in water sample Mw=?ppm in water sample...
Saturday, June 2, 2012 at 3:32am by lynda

chem
the combustion of 1.83 grams of a compound which only contains C,H, and O yields 4.88 grams of CO2, and 1.83 grams of H2O. What is the empirical formula of this compound? ------------------------------------------ 4.88 g CO2 x 1 mol CO2/44.01 g CO2 x 2 mol O2= .2217 mol O2 1....
Sunday, August 19, 2012 at 1:14pm by greeny

Chemistry
Someone else did a problem just like it, and here is his setup; I just changed the numbers, and you should check my numbers mass of C in sample = mass of C in CO2 mass of C in sample = (0.3051 g CO2 / 44 g/mol)(1 mol C / 1 mol CO2)(12 g/mol) = 0.08321 g mass of H in sample = ...
Thursday, March 14, 2013 at 7:16pm by Devron

Chemistry
The heat capacity of liquid water is 4.18 J/gC and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67C into 1.00 g of steam at 100C? A. 22.7 kJ B. 40.8 kJ C. 2.2 kJ D. 2,400 J E...
Thursday, February 3, 2011 at 8:01am by Dorian

Chemistry
Steam at 100C was passed into a flask containing 250 g of water at 21C, where the steam condensed. How many grams of steam must have condensed if the temperature of the water in the flask was raised to 76C? The heat of vaporization of water at 100C is 40.7 kJ/mol and the ...
Wednesday, October 8, 2008 at 11:45pm by Ryan

AP Chemistry
Consider a 50.4 g sample of H2O(g) at 115C. What phase or phases are present when 156 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J/gC; liquid, 4.2 J/gC; steam, 2.0 J/gC, Hvap = 40.7 kJ/mol, Hfus = 6.02 kJ/mol. (Select all that apply...
Friday, November 28, 2008 at 11:25pm by Robert

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 ...
Monday, February 28, 2011 at 9:43am by romell

Chemistry- please check my work
Compute the vapor pressure of water above a solution formed by dissolving 25.00 grams of magnesium sulfate, MgSO4 (MM=120.3) in 95.00 grams of water at 338K. The vapor pressure of pure water at 338K is 188.0 torr. I took 95.00g H20 divided by 18.0g. which gave me moles for top...
Monday, February 23, 2009 at 9:19pm by Eliz

Chemistry
A 10.00 g sample of He is compressed isothermally from a volume of 61.1 L to a volume 2.00 L at a temperature of 25 C. Calculate the work done by the gas on the surroundings if the external pressure is 101.325 kPa.
Monday, April 9, 2012 at 1:57am by sol

Chemistry
I can not be sure about this one, but I will give it a try. 0.383g is H20 since you know that 10 moles of H20= 1 mole of Na2SO4, then 0.383g of H20*(1 mole of H20/18g of H20)=moles of H20 in sample, moles of H20 in sample*(1 mole of Na2SO4/10moles of H20)= moles of Na2SO4 that...
Wednesday, February 20, 2013 at 3:38pm by Devron

chemistry please help
calculate the concentration of silver nitrate in mol/L M x V =0.2 average Vw in ml of 2.23 2.26 2.43 MxVw = Mwx20 Mw=? mol/L chloride in water sample = mmol/L? =?g/L chloride in sample =?ppm chloride in water sample
Monday, June 4, 2012 at 3:43am by lynda

Chemistry
A 100g sample of ice at 0C is added to 150.0 mL of liquid water at 80C in a styrofoam cup calorimeter. (The specific heat capacity of water is 1.184 J/gC, the density of water is 1.00 g/mL, and ∆Hfus = 6.01 kJ/mol) a) Does all of the ice melt?( show work to recieve ...
Monday, November 5, 2012 at 3:53pm by Lauren

GenChem II
What mass of CsBr must be added to .500L of water to produce .4molality solution? What are mole fraction and mass percent? Here is my work and below I will post a question about it: 1 mol CsBr = 212.81g density of water = 1g/mL d=mv 1=x/500 x=500g of water --> solvent ....
Thursday, February 18, 2010 at 11:28am by Chem

11th grade
A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the bottom of the cylinder ...
Friday, January 2, 2009 at 6:12pm by rikita

Chemistry
A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the bottom of the cylinder ...
Monday, January 5, 2009 at 8:37pm by lulu

chemistry
A sample of argon of mass 10.4 g occupies 2100 ml at 30 oC . (i) Calculate the work done by the gas when it expands isothermally against a constant external pressure of 31.1kPa until its volume has increased by 483.1ml. (ii) Calculate the work done by the gas if the same ...
Wednesday, January 11, 2012 at 3:28am by sand

chemistry
A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water is 24.0 degrees C. If the molar enthalpy of freezing gallium is -5.54 kj/mol, what is the final temperature of the water? Thanks
Sunday, November 7, 2010 at 10:04pm by Bob

Chemistry- Please help me
A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00 cm, and a piston is carefully placed on the surface of the compound so that, for all practicla purposes, the distance between the bottom of the cylinder ...
Tuesday, December 16, 2008 at 10:52pm by Lauren

Chemistry
if the temperature of a 500.0g sample of liquid water is raised to 2.00c how much heat is absorbed by the water? The specific heat of liquid water is 4.184J/(g*c)
Tuesday, February 23, 2010 at 8:46pm by Anonymous

chemistry
If the temperature of a 500.0-g sample of liquid water is raised 2.00c how much heat is absorbed by the water?The specific heat of liquid water is 4.184j/(g*c)
Friday, January 25, 2013 at 3:34pm by gabriella

Chemistry
CFCs such as CF2Cl2 are refrigerants whose use has been phased out because their destructive effect on Earth's ozone layer. The standard enthalpy of evaporation of CF2Cl2 is 17.4 kJ/mol, compared with change in H(vapor)=41kJ/mol for liquid water. How many grams of liquid ...
Sunday, November 6, 2011 at 1:29pm by Kay

Chemistry
A mixture of .10 mol of NO, .050 mol of H2 and .10 mol of H20 is placed in a 1 liter vessel at 300 K. The following equilibrium is established. 2 NO + 2 H2 <----> N2 + 2 H20 At equilibrium (N0) = .062 M. What are the equilibrium concentrations of H2 N2 and H20
Monday, March 29, 2010 at 9:07pm by Thomas

Chemistry
A mixture of .10 mol of NO, .050 mol of H2 and .10 mol of H20 is placed in a 1 liter vessel at 300 K. The following equilibrium is established. 2 NO + 2 H2 <----> N2 + 2 H20 At equilibrium (N0) = .062 M. What are the equilibrium concentrations of H2 N2 and H20
Monday, March 29, 2010 at 9:12pm by Thomas

Chemistry
I'll get you started.... 8.00 mass percent means that 100 g of the solution as 8.00 g of ammonia and 94.00 g of water. The 100 g of solution will have a volume of 100 g / 0.9651 g/ml =103.61 ml Thus (based on NH3) the 8.00 g represents 8.00 g /17 g mol =0.4706 mol so ...
Wednesday, December 14, 2011 at 1:04am by Dr Russ

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
Thursday, January 30, 2014 at 9:17pm by Bryan Josten

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
Friday, January 31, 2014 at 3:04am by Bryan Josten

Chemistry
18.0 g of liquid water is initially at 0 C. How much heat, in kJ, must be added to transform this into 18.0 g of steam at 200 C? The heat capacity of liquid water is 75.3 J/mol C. The heat capacity of steam is 37.4 J/mol C. The heat of vaporization is 40.65 kJ/mol.
Friday, December 16, 2011 at 3:47pm by Kimmy

Chemistry
Delta H Vap (h20)=40.7Kj/mol How much water vaporized with 155Kj/mol?
Friday, April 22, 2011 at 9:03am by Joey

chemistry
what is the total number of joules released when a 5.00 gram sample of water changes from liquid to gas at 100 degrees Celsius?
Wednesday, December 15, 2010 at 6:24pm by Help

chemistry
The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9 g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0C to ________C. Assume that the solution has the ...
Monday, March 21, 2011 at 11:52pm by Kamila

Lauren
The specific heat of water is at 4.184J/g * degree C. How much heat is evolved, or absorbed, when the temperature of 9.00 mol of liquid water cools from 38 degrees C to 28 degrees C? How do I start this problem
Friday, November 16, 2007 at 6:37pm by Chemistry

chemistry
for the vaporization of water at 1.00 atm, delta H=43.54 kj/mol at 298 K and delta H= 40.68 kj/mol at 373 K. the constant-pressure heat capacity of liquid water is 75.3 J/molK. calculate the constant pressure heat capacity for H2O(g).
Monday, May 9, 2011 at 1:09pm by anna

chemistry
The enthalpy change for the solution process when solid sodium hydroxide dissolves in water is -44.4 kJ/mol. When a 13.6 g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0 o C to __________ o C. Assume that the ...
Monday, November 15, 2010 at 2:25pm by Anonymous

ap chemistry
The volume of 0.100 mol of helium gas at 34C is increased isothermally from 1.00 L to 4.50 L. Assuming the gas to be ideal, calculate the entropy change for the process.
Friday, April 12, 2013 at 10:07am by sarah

Chemistry
Nonane has a density of 0.79 g/mL. and boils at 151 Celcius. a. What is the condensed structural formula of nonane b. Is it a solid, liquid, or gas at room temperature c. Is it soluable in water d. Will it float on water or sink
Tuesday, July 20, 2010 at 2:41pm by Elisabeth

science
multiple select Select all of the items that are true about a sample of water vapor at 101°C as it cools. 1) Its temperature will fall continuously until it condensed into a liquid. 2) Its temperature will fall steadily until reaching 100°C. 3) The molecules of water gain ...
Wednesday, November 17, 2010 at 11:14am by danny

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
Friday, June 25, 2010 at 10:40am by Ana

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
Friday, June 25, 2010 at 10:40am by Ana

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
Friday, June 25, 2010 at 7:05pm by Ana

chemistry
a volatile liquid was allowed to evaporate in a 43.298g flask that has a total volume of 252 mL.,the temperature of the water bath was 100 celcius at the atmospheric pressure of 776 torr.the mass of the flask and condensed vapor was 44.173g.calculate the molar mass of the liquid.
Wednesday, June 23, 2010 at 2:48pm by Ana

chemistry
A volatile liquid was allowed to evaporate in a 43.298g flask that has a total volume of 253 mL. The temp of the water bath wad 100 C at the atmospheric pressure of 776 torr. The mass of the flask and condensed vaporous was 44.173g. Calculate the molar mass of the liquid
Tuesday, April 10, 2012 at 12:26am by tiffany

Chemistry
A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g. Calculate the molar mass ...
Wednesday, April 6, 2011 at 10:48pm by Linda

Chemistry
A 108 mL gas sample has a mass of 77.96 mg at a pressure of 1140 mmHg and a temperature of 183 °C. Assume ideal gas behavior and a completely insulated system, and please don’t forget units with your answers. The system is cooled. Calculate the amount of heat that will be ...
Monday, March 10, 2014 at 11:30am by keitanako

chemistry
Can someone just get me started on this im not sure of how to go about solving this. The heat of vaporization of carbon disulfide, CS2, at 25 C is 27.2 kJ/mol. 1.00 mol of carbon disulfide vapor condenses to liquid at 25 C. The entropy of this vapor at 25 C is 243 J/(molK...
Monday, November 1, 2010 at 12:03am by steve

Chemistry
Supposing all the "gas" is water vapor. The source below gives the specific heat of water vapor and liquid water: (2.000 J/(gC) x ((0.07796 g) x (125 C - 100 C) = 3.898 J from cooling the vapor to 100 C (0.07796 g H2O) / (18.01532 g H2O/mol) = 0.00432743 mol H2O (40.7 kJ/...
Monday, March 10, 2014 at 11:30am by Vladimir

chemistry
if PV=RT + ἁP where ἁ is a constant Calculate the work if the gas is heated at constant pressure from T1 to T2 Calculate the work if the gas is expanded isothermally and reversibly
Wednesday, February 2, 2011 at 4:18pm by noel

chemistry
the enthalpy of fusion of ice is 6.02 kJ/mol. the heat capacity of liquid water is 75.4 J/molC. What is the smallest number of ice cubes at 0 degrees C each containing one mole of water, necessary to cool 500g of liquid water initially at 20.0 degree C to 0.0 degree C
Tuesday, May 24, 2011 at 6:36pm by el

AP Chem
Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest? Heat of Vap and fusion too? No idea! What is the enthalpy change during the process in which 100.0 g of water at 50.0 C is cooled to ice at...
Saturday, February 23, 2013 at 5:45pm by Chemkid

AP Chem
Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest? Heat of Vap and fusion too? No idea! What is the enthalpy change during the process in which 100.0 g of water at 50.0 C is cooled to ice at...
Saturday, February 23, 2013 at 5:51pm by Chemkid

Chemistry
Ok. Please. Check. Thank you both so much. Mass of water: 43.0-26.1=16.9 g H2O Moles of water: (16.9 g H2O)(1 mol H2O/18.0 g H2O)= 0.939 mol H2O Moles of cobalt (II) sulfite: CoSO3= 58.9332+32.066+3(15.9994)=138.9974 g/mol (26.1 g CuSO3)(1 mol CuSO4/138.9974 g CuSO3)= 0.188 ...
Friday, October 26, 2012 at 7:52pm by Elizabeth

chemistry
How much energy (in kilojoules) is needed to heat 5.45g of ice from -12.0 C to 32.0 C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K x mol) for ice and 75.3 J/(k x mol) for liquid water
Thursday, December 2, 2010 at 11:17pm by emily

CHEMISTRY
And a density of 1.00 g/mL. 140 mL = 140 g liquid. q = mass water x specific heat water x (Tfinal-Tinitial) = 0 You have mass and specific heat as well as Tf and Ti. solve for q. That is the heat generated. It is delta H, dH. dH/0.007 mol gives dH/mol AgCl.
Monday, April 30, 2012 at 11:21pm by DrBob222

CHEM
Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter constant is 25550 J/ ...
Sunday, October 7, 2007 at 1:50pm by Kate

Chemistry
Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed vapor. ...
Thursday, December 15, 2011 at 12:59pm by Mika

AP Chemistry
I have the following marathon problem but am unsure where to start: A Sample consisting of 22.7g of nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00cm, and a piston is carefully placed on the surface of the compound so that, for all ...
Tuesday, October 2, 2007 at 7:51pm by Derek

AP Chemistry
I have the following marathon problem but am unsure where to start: A Sample consisting of 22.7g of nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00cm, and a piston is carefully placed on the surface of the compound so that, for all ...
Tuesday, October 2, 2007 at 7:52pm by Derek

chemistry
The heat of vaporization of liquid water at 373 K is 40.7 kJ/mol. The value of the enthalpy change when 2.00 g of steam condenses at 373 K is?
Sunday, November 28, 2010 at 7:17pm by Anonymous

AP CHEMISTRY
Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter constant is 25550 J/ ...
Sunday, October 7, 2007 at 5:49pm by Kate

Chemistry
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
Tuesday, September 16, 2008 at 9:02pm by Jimmy

Chem
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
Saturday, February 4, 2012 at 9:46pm by Dan

Science
You don't say how big the sample is as this can change the approach needed. In addition if the sample is mostly sand with a small amount of water and ethanol then a different method is needed. If a small amount of sand suspended in water/ethanol mixture, filter the mixture to ...
Tuesday, April 27, 2010 at 7:47am by Dr Russ

Analytical chemistry
A water sample was analysed using a sodium selective electrode. The electrode response was 75.0 mV. A 10.00 mL aliquot of standard 0.50 mmol/L NaCl solution was added to 10.00 mL of water sample. The well-mixed solution gave a response of 98.0 mV. What is the concentration of ...
Monday, August 12, 2013 at 8:33am by RC

chemistry
For each of the following solutions, calculate the initial pH and the final pH after adding 0.010 mol of HCℓ. a) 500.0 mL of pure water i'm not sure how to do this question.. would the equation be h20+h30 equilibrium arrows h30+h20
Wednesday, December 1, 2010 at 10:33pm by help

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

AP Chemistry
Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) ----> CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 a)find g H in hydrocarbon 1.18g/...
Tuesday, February 5, 2008 at 8:35pm by Jake

Chemistry
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL sample of the 1.00 L solution was reacted with excess AgNO3 and 0....
Friday, September 21, 2012 at 11:34am by Adam

chemistry homework help!!
if you have 380.0mL of water at 25.00 degrees Celsius and add 140mL of water at 95.00 degrees Celsius, what is the final temperature of the mixture? Use 1.00 g/mol as the density of water.
Sunday, February 26, 2012 at 12:57am by danielle

Chemisrty
Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed vapor. ...
Thursday, December 1, 2011 at 8:51pm by BB

Chemistry
Reposting with correct information..Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in ...
Thursday, December 8, 2011 at 4:51pm by Minx

chemistry
I did a lab in chemistry in which 15-mL jumbo Beral pipets with acetone was heated in boiling water until all of the liquid evaporated. Then the pipets were placed into room temperature water so that the evaporated liquid turns into condensed vapor. The molar mass was later ...
Wednesday, September 24, 2008 at 10:17pm by Jerry

chemistry
A certain liquid has vapor pressures of 50 Torr. 1 mol of an involatile solute is dissolved in 1 mol of this liquid. What is the vapor pressure of the liquid above this solution?
Monday, March 19, 2012 at 3:10am by joey

Science
The slope of a Volume vs. Mass graph is equal to its density. Calculate the slope of the liquid line A and the Liquid B Line on your graph, show your work.... Data: Liquid a: (M/V) 9.00/10.0 19.60/20.00 30.50/30.00 39.90/40.0 49.30/50.0 Liquid b(M/v) 9.00/10.0 17.60/20.00 25....
Sunday, September 30, 2007 at 4:23pm by Anonymous

Physics
How much heat must be removed when 25 grams of steam at 100C Is condensed to form liquid water at 100C?
Wednesday, March 6, 2013 at 9:15pm by tasha

Chemistry
How much heat is released when 75.0 g of steam at 100.0C is cooled to ice at -15.0C? The enthalpy of vaporization of water is 40.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol C), and the molar heat ...
Tuesday, April 13, 2010 at 7:32pm by Bob

CHEM
mass of C in sample = mass of C in CO2 mass of C in sample = (0.8635 g CO2 / 44 g/mol)(1 mol C / 1 mol CO2)(12 g/mol) = 0.2355 g mass of H in sample = mass of H in H2O mass of H in sample = (0.1767 g H2O / 18 g/mol)(2 mol H / 1 mol H2O)(1 g/mol) = 0.0196 g mass of O in sample...
Thursday, March 14, 2013 at 7:07pm by shane

CHEMISTRY
Consider a 58.4 g sample of H2O(g) at 125C. What phase or phases are present when -162 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J g-1 C-1; liquid, 4.2 J g-1 C-1; steam, 2.0 J g-1 C-1, ΔHvap = 40.7 kJ/mol, ΔHfus = 6.02 kJ/mol. (...
Saturday, November 17, 2012 at 12:27am by Sarah

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