9 The critical temperature and critical pressure of naphthalene are 474.8 K and 40.6 atm, respec- tively. Calculate the van der Waals constants a and b for naphthalene.

Value of a=15.75095 atm L^2/ mol^2

Value of b=0.11986 L/mol

Explanation:

The formulas for constants a and b are given by:

For Constant a:

Where:

T_c is critical Temperature

P_c is critical Pressure

R is gas constant=0.0820 atm.L/mol.K

For Constant b:

Where:

T_c is critical Temperature

P_c is critical Pressure

R is gas constant