A vessel contains 0.15 m^3 of a gas at pressure 8 bar and temperature 140 °C with c_p=3 R and c_v=2 R. It is expanded adiabatically till pressure…

A vessel contains $\displaystyle 0.15 \mathrm{~m}^3$ of a gas at pressure $\displaystyle 8$ bar and temperature $\displaystyle 140$ °C with $\displaystyle c_p=3 R$ and $\displaystyle c_v=2 R$. It is expanded adiabatically till pressure falls to $\displaystyle 1$ bar. The work done during this process is $\displaystyle \_\_\_\_$ k J. (R is gas constant)