A sample consisting of 1.5 mol of perfect gas molecules with Cp,m = 20.8 J K-1 mol-1 is initially at 230 kPa and 315 K. It undergoes reversible…

A sample consisting of 1.5 mol of perfect gas molecules with Cp,m = 20.8 J K–1 mol–1 is initially at 230

kPa and 315 K. It undergoes reversible adiabatic expansion until its pressure reaches 170 kPa.

Calculate the final volume and temperature and the work done.