thermodynamics

Helium undergoes a polytropic process compression ( pv^n =constant, with n-1) in a piston- cylinder assemble from p1 =2.2 bar T1 =-13.3 C to P2 = 6.c . Assuming the ideal gas model and a constant specific heat ratio k = 1.5, determine the heat transfer per unit masss, in kl/kg, during the compression process. Kinetic and potential energy effects are negligible. Hint : Recall that v= V/M and 1 bar = 10^5 N/m^2 . the mass of helium is not known and it is not required to find the solution of the problem.

There are 2 other questions

I will post during the conversation,