Question

The critical temperature and critical pressure of a gas are 31c and 728 atm respectively.calculate constant 'a 'and 'b'.

Answer 1

Welcome Shivam,

◆ Answer -

a = 0.36 L².atm/mol²

b = 0.0043 L/mol

● Explaination -

# Given -

T = 31 ℃ = 304 K

P = 728 atm

# Solution -

Standard form of van der Waal's equation is given by -

P = RT/(V-b) - a/V²

Van der Waal's constant 'a' is calculated as -

a = 27(RT)² / 64P

a = 27 × (0.082×304)² / (64×728)

a = 0.36 L².atm/mol²

Van der Waal's constant 'b' is calculated as -

b = RT / 8P

b = (0.082×304) / (8×728)

b = 0.0043 L/mol

Thanks dear...