Problem $5.$ A piston$-$cylinder assembly contains air at a pressure of $1$ bar and volume of $0\mathrm{.}3m^3.$ The

pressure is slowly increased until it reaches $3$ bar. The piston$-$cylinder assembly is placed in a constant$-$

temperature oil bath so that the temperature of air always remains at $80C$ throughout the process.

Determine: $($a$)$ the mass of air, $($b$)$ the amount of work done in kJ $,$ and $($c$)$ the amount of heat transfer in

kJ$.$