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michael
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Homework Statement
1 mole of an ideal gas initially at 100° C and 10 atm is expanded adiabatically against a constant pressure of 5 atm until equilibrium is re-established. Given that the temperature dependence of the heat capacity is CV = 18.83 + 0.0209T calculate deltaU, deltaH and deltaS for the change in the gas.
Homework Equations
The Attempt at a Solution
I'm trying to find delta U. I know that U is given by the integral of CvdT between the initial and final temperatures so I have that expression. My problem is in finding the final temperature. To get this value most expressions use either gamma or the final volume(or both), both of which I don't know. Since gamma=1+R/Cv and Cv is temperature dependant I'm not sure gamma is even useful anymore. So the temperature dependence of Cv is really throwing me off here. Any hints would be great.