Thermodynamic Properties of Vapors from Speed of Sound

Table 7

AAD in the transcritical domain.

Substance	AAD [%]
	𝑍	𝑐𝑣	𝑐𝑝
Ar	0.0031	0.0573	0.0680
N2	0.0039	0.0671	0.0672
CH4	0.0016	0.0435	0.0957
CO2	0.0009	0.0222	0.0943
Mean	0.0024	0.0475	0.0813