Calculate the change in enthalpy of carbon dioxide using both the ideal-gas table and the enthalpy departure chart if its state changes from:
a) 320 K and 800 Pa to 300 K and 6 MPa
b) 400 K and 2 MPa to 400 K and 12 Mpa
c) 500 K and 400 kPa to 900 K and 10 MPa