A Gas (Cv, m =5/2 R) behaving ideally was allowed to expand reversibly and adiabatically from 1 litre to 32 litre. It's intial temperature was 327°C The molar heat enthalpy change ( in j/mol) for the process is My attempt From polytropic equation. $C_v$=R/ $\Gamma-1$ Solving this gives me ...