- #1
Lagraaaange
- 82
- 0
Homework Statement
Hvap = 22.6E5 J/Kg. R=8.315E3 Jkmol^-1K^-1. 1kmol water = 18kg
Keeping in mind that latent heats are enthalpies, what is the change in internal energy when 1kg water is converted to steam at pressure of 1atm and temperature of 100C.
Homework Equations
dU = dQ - PdV.
The Attempt at a Solution
dQ = mHvap
PdV = 1atm (Vfinal - Vinitial) Vfinal >>Vinitial -> PdV = 1atm(Vfinal).
Assume ideal gas-> V = nRT/P =18kilomoles * R*373 / 1atm?