find the hear transfer in Btu

Air is compressed in a piston-cylinder assembly from p1=25 Ibf/in2,T1=500R,V1=9ft3 to a final volume of V2=1ft3 in a process described by pv1.30= constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T1, determine the work and the heat transfer, in Btu. Step 1 Determine the work, in Btu. W12= Btu Determine the heat transfer, in Btu. Q12= eTextbook and Media