1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Physical chemisty

  1. Nov 21, 2011 #1
    1. The problem statement, all variables and given/known data
    The Clausius-Clapyeron equation ln(p2/p1) = -ΔHvap/R (1/t2 - 1/t1) is derived assuming that ΔHvap is independent of temperature.
    Find ΔHvap as a function of temperature for ethanol at constant external pressure.

    2. Relevant equations

    these are not relevant equations but the equations that i tried solving using-
    dU = TdS − pdV

    3. The attempt at a solution
    i tried starting with the equation for dh and integrating it. i also tried to derive using the clapyeron equation dp=(ΔH/tΔv) dt but i keep getting stuck. the other half of the question asks to derive the clausius clapyeron using the ΔH of this question so I am skeptic about the way I have approached this question.

    Attached Files:

    Last edited: Nov 21, 2011
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted