Equation of State

Perfect Gases

Eq. 2.1.1

Where:

P is the absolute pressure in kPa

r is the density in kg/m3

R is the universal gas constant = 8.314 kJ/kmole.K

Mw is the molecular weight of the gas (kg/kmole)

T is the absolute temperature K

Real Gases

Real gases follow the ideal gas law closely. A factor, Z, called compressibility factor, is often introduced to show the deviation from ideal behaviour. Z = 1.0 means the gas is behaving like an ideal gas.

Eq. 2.2.1