Vanderwaal's constants for hydrogen chloride gas are a = 3.67 atm lit^(-2) and b = 40.8 ml mol^(-1). Find the critical temperature and critical pressure of the gas.

Vanderwaal's constants for hydrogen chloride gas are a = 3.67 atm lit^

1.	Vanderwaal's constants for hydrogen chloride gas are a = 3.67 atm lit^(-2) and b = 40.8 ml mol^(-1). Find the critical temperature and critical pressure of the gas.
Answer» Solution :`T_(c) = (8a)/(27 RB)` `= (8 xx 3.67 )/(27 xx 0.0821 xx 0.0408) = 324.7` K `= 51.7^(@) C` `P_(c) = (a)/(27 B^(2)) = (3.67)/(27 xx (0.0408)^(2)))` `= 81.6` atm