Question

A piston/cylinder contains 0.001 m³ air at 300 K, 150 kPa. The air is now compressed in a process in which P V^1.25 = C to a final pressure of 600 kPa. Find the work performed by the air and the heat transfer. 

Answer 1

C.V. Air. This is a control mass, values 

Continuty: m₂ = m₁

Energy Eq.   m(u₂ − u₁) = ₁Q₂ − ₁W₂

Process : PV_1.25 = const.