What is the specific heat capacity of helium?

Vibhor27 Jul, 2022Education

at constant volume [Cv] it is 3/2 R at constant pressure [Cp] it is 5/2 R. This is ideal gas behavior. values at -150C are 3.01 and 4.99 cal/mole deg which come pretty close, calc 2.98 and 4.97. He, a monatomic molecule with no rotational and vibrational modes to partition energy into and small molecular volume and intermolecular forces, behaves ideally at reasonable T&P.