An insulated cylinder/piston contains carbon dioxide gas at 120 kPa, 400 K. The gas is compressed to 2.5 MPa in a reversible adiabatic process. Calculate the final temperature and the work per unit mass, assuming
a. Variable specific heat, Table A.8
b. Constant specific heat, value from Table A.5
c. Constant specific heat, value at an intermediate temperature from Table A.6