All Problems Second law of thermodynamics, entropy
Problem 2.144
In some process the tem perature of a substance depends on its entropy \(S\) as \(T=a S^{n},\) where \(a\) and \(n\) are constants. Find the corresponding heat capacity \(C\) of the substance as a function of \(S\). At what condition is \(C<0 ?\)