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Entropy

Does a solid ...

Question

Does a solid also have two kinds of molar heat capacities C_p and C_v? If yes, is C_p > C_v? Or is C_p − C_v = R?

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Solution

Yes, a solid also has two kinds of molar heat capacities, C_pand C_v. In a solid, expansion coefficient is quite small; therefore dependence of heat capacity on the process is negligible. So, C_p> C_vwith just a small difference, which is not equal to R.

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