The ratio of specific heats, for the exhaust gases adiabatic gas constant, is the relative amount of compression/expansion energy that goes into temperature \(T\) versus pressure \(P\) can be characterized by the heat capacity ratio: \(\gamma\frac{C_P}{C_V}\), where \(C_P\) is the specific heat (also called heat capacity) at constant pressure, while \(C_V\) is the specific heat at constant volume. (http://qudt.org/schema/qudt/LatexString)