Posted by **mel** on Monday, November 26, 2007 at 1:24pm.

One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and 100.°C, 40.66 kJ of heat is released. If the density of H2O(l) at this temperature and pressure is 0.996 g/cm3, calculate E for the condensation of one mole of water at 1.00 atm and 100.°C.

- chem -
**DrBob222**, Monday, November 26, 2007 at 11:03pm
Delta E = q + w

q = -40.66 kJ.

w = -p(delta V) = -p(V2-V1)

p = 1.00 atm.

V1 = 30.6 L

V2 = calculated from density. 1 mol H2O has mass of 18.015 g, density is 0.996, V2 = ??

Don't forget to change w from L*atm units to J by multiplying w*101.3 J/L*atm. Also remember w is in Joules and q is in kJ so make them the same unit.

Post your work if you get stuck.

- chem -
**Anonymous**, Wednesday, November 28, 2007 at 4:59pm
i don't get how to convert the density to V2...

- chem -
**Anonymous**, Friday, February 13, 2009 at 12:24pm
density=mass/volume so volume=mass/density

- chem -
**Anonymous**, Saturday, April 10, 2010 at 7:44pm
how do you convert cm^3 to L so you can subtract V1 from V2

- chem -
**Anonymous**, Friday, October 22, 2010 at 12:25am
100 Cm^3=1 L

- chem -
**Anonymous**, Tuesday, September 25, 2012 at 10:14pm
1000 cm^3 = 1 L since 1 cm^3 = 1 mL and since there are 1000 mL in one L.

## Answer This Question

## Related Questions

- chemistry - One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 ...
- College Chemistry - One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume ...
- Chemistry - One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 ...
- CHEMISTRY - One mole of H2O(g) at 1.00 atm and 100 degrees C occupies a volume ...
- Chemistry-Dr.Bob, I need you!!!! - You can mix 100.mL of 1.0 M HCl with 100 mL ...
- Chemisty (please read soon) - which will become a buffer in 1L of H2O? a) 0.3 ...
- Chemistry - For :H2O(g) --> H(g) + OH(g); At 3000K and P(total)=1.00 atm, ...
- College Chemistry - Determine how many grams of water can be produced from ...
- chemistry - Use Table 9.4 to calculate an approximate enthalpy or heat of ...
- Chemistry - What is the molarity of the resulting saline solution when you mix 1...

More Related Questions