DEVIATION FROM IDEAL GAS BEHAVIOUR

Real Gas: A gas which does not follow ideal gas behaviour under all conditions of temperature and pressure, is called real gas. Deviation with respect to pressure can be studied by plotting pressure Vs volume curve at a given temperature. (Boyle’s law)

Compressibility factor (Z): Deviation from ideal behaviour can be measured in terms of compressibility factor, Z.

• van der Waals Equation
 
Where V is a constant for molecular attraction while ‘V is a constant for molecular volume.
(a) There is no force of attraction between the molecules of a gas.
(b) Volume occupied by the gas molecule is negligible in comparison to the total volume of the gas.
Above two assumptions of the kinetic theory of gas was found to be wrong at very high pressure and low temperature.

Related Topic Name

1. INTERMOLECULAR FORCES
2. THERMAL ENERGY
3. INTERMOLECULAR FORCES vs THERMAL INTERACTIONS
4. THE GASEOUS STATE
5. THE GAS LAWS
6. IDEAL GAS EQUATION
7. KINETIC ENERGY AND MOLECULAR SPEEDS
8. KINETIC MOLECULAR THEORY OF GASES
10. LIQUEFACTION OF GASES
11. LIQUID STATE