Gas streams are often cooled either by expansion through a
throttling valve or in a power turbine .To measure the relative
efficiency of these 2 process the term KH/KS
is quoted.The throttling coefficient is defined as KH
=(dT/dP)H,The isentropic coefficient is described as
(dT/dP)s. Calculate
KH/KS, for CO2 at 319.4 K and P 0.1.Also
determine the compressibility factor.Use the peng robinson equation
of state.For CO2, TC = 304.2K, PC = 73.76
bar, ɯ = 0.225





