Table A-2 gives variable molar specific heat data for gaseous methane that might

ID: 1845945 • Letter: T

Question

Table A-2 gives variable molar specific heat data for gaseous methane that might be integrated to give the change in specific enthalpy. Another approach is to use tabular data from NIST (already integrated) to compute the average specific heat. Using the fact that at constant pressure, average specific heat is defined as the (change in specific enthalpy)/(change in the temperature), determine the average value of specific heat in the range of 300K to 500K.

Temperature (K)

Enthalpy (kJ/kg)

Cp (J/g*K)

300.00

735.66

3.5478

350.00

901.76

3.1601

400.00

1056.4

3.0577

450.00

1209.7

3.0890

500.00

1366.3

3.1838