Question

State gas equations for real gas.

Answer 1

Gases: In contrast, changing the pressure or temperature of a gas will have an easily observable effect on the volume of that gas. For an ideal gas (no intermolecular interactions and no molecular volume) n appropriate equation of state would be: V(T,P,n) = (nRT)/P.

Answer 2

A gas which doesn't follow ideal gas behaviour that is obeying all gas laws at any temperature and pressure is called as real gas.

Related Information:-

• Real gases have a very low pressure.
• These gases have high temperature.
• On considering the compressibility factor(z),

The compressibility factor (z) is ;

Z = PV/nRT

So For real gas, z≠1

So, PV≠nRT.

The van der Waals equation is an equation that is valid for real gases. The two properties of real gases are the excluded volume of gas particles represented as 'b' and attractive forces between gas molecules as 'a'.

The formula for Van der waals Force is :

[P + a(n/V) ²][V-nb]=nRT