|Dec7-04, 04:50 PM||#1|
Letís say we have a 1 mol system in a state A (Pa,Va,Ta are given) and we take it to a state B(Pb,Vb are given) . We want to know whatís the maximum work we can give to a reversible work source. Considering the process is carried out attached to a 150 K heat source, the only data available is this:
1. equation of adiabatic reversible curve
2. Cp (heat capacity at a given constant pressure (Pa )
3. Alpha (expansion coefficient at a given constant pressure (Pa )
Iíve translated the problem into this: find A Helmholtz free energy change between points A and B. However I donít know how to get dF=-SdT-PdV from the experimental coefficients mentioned above.
Iíd appreciate your help very much.
|Dec8-04, 05:22 AM||#2|
Just a hint is enough. I don't have any sample problems nor thermo books so I don't know where to start from
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