Gases - Molar Specific Heats

Molar specific heats for some common gases at constant volume. This table provides approximate molar specific heats at constant volume at room temperature for common gases in kcal/kmole K.

GasSpecific Heat - Cv (kcal/kmole K)
Argon (Ar)3
Carbon monoxide (CO)5.02
Chlorine (Cl2)6.01
Ethane (C2H6)10.3
Ether ((C2H5)2O)30.8
Helium (He)3.02
Hydrogen (H2)4.88
Mercury vapor (Hg)3
Nitrogen (N2)6.97
Oxygen (O2)4.99
Sulfur dioxide (SO2)7.5

Conversion Factors:

1 kcal = 4186.8 J = 426.9 kp m = 1.163×10⁻³ kWh = 3.088 ft lbf = 3.9683 Btu = 1000 cal