Question

The vander Waals constant 'a' for the gases O 2 ​,N2,NH3and CH4are 1.360, 1.390, 4.170 and 2.253 L^2 atmmol ^−2 respectively .the gas which shows highest critical temperature is ​

Answer 1

Answer:

NH

3

Van der Waal's constant 'a' is an indirect measure of inter-molecular attractive forces. Ammonia contains strong inter-molecular forces of attraction. Inter-molecular hydrogen bonding is absent in other gases.

Hence, the value of van der Waal's constant 'a' is larger for ammonia than for other gases.

Hence, ammonia can be most easily liquefied