5.22 Critical temperature for carbon dioxide and methane are 31.1 °C and –81.9 °C respectively. Which of these has stronger intermolecular forces and why?
The critical temperature we know is the highest temperature at which liquid exists above it is gas.
Given that the critical temperature of Carbon dioxide and Methane are.
Higher is the critical temperature of a gas, easier is its liquefaction.
So, as the critical temperature increases the gas is now easier to liquefaction.
That means the intermolecular forces of attraction between the molecules of a gas are directly proportional to its Critical temperature.
Hence, Carbon dioxide has stronger intermolecular forces than Methane.