Heat And Thermodynamics

Initially the pressure of 1 mole of an ideal gas is $10^5 \mathrm{Nm}^{-2}$ and its volume is 16 L . When it is adiabatically compressed, its final volume is 2 L . Work-done on the gas is

$\left[\right.$ molar specific heat at constant volume $\left.=\frac{3}{2} R\right]$