Critical temperature for carbon dioxide ...

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?

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The critical temperature of a gas is a measure of the intermolecular forces of attraction in the gas. A gas with stronger intermolecular forces of attraction has higher critical temperature. Therefore, `CO_(2)` gas possesses stronger intermolecular forces of attraction than `CH_(4)` gas because `CO_(2)` has higher critical temperature than `CH_(4)`.

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