Properties and Property Relations:Monatomic Gases (Noble Gases)

Monatomic Gases (Noble Gases)

For monatomic gases, i.e., the noble gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn), the specific heats are true constants with the values

and the caloric equation of state follows from straightforward integration as

With cp = const, the integration in (6.20) can be performed easily, and the entropy becomes

Since the resulting expressions for the thermodynamic quantities of monatomic gases are rather simple, these are typically not tabulated.