\mathrm{~mol}\) of an ideal gas was initially at \(293 \mathrm{~K}\) and \(15 \mathrm{~atm}\). The expansion of gas takes place adiabatically when the external pressure is reduced to \(5 \mathrm{~atm}\). What will be the final temperature and volume? Also calculate the work done during the process, given that \(C_{P}=8.58 \mathrm{cal} / \mathrm{mol} /\) degree.