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The van dar waals constant 'a' for CO(2)...

The van dar waals constant 'a' for `CO_(2)` and `CH_(4)` gases are 3.6 and 2.3 `L^(2)*atm*mol^(-2)`. Which one of these two gases can easily be liquefied?

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The vn der waals constant 'a' for a real gas is a measure of the strength of intermolecular forces of attraction in the gas. The stronger the intermolecular forces of attraction in a gas, the greater is the value of 'a'. Again, a gas with stronger intermolecular forces of attraction can easily be liquefied. as the value of 'a' for `CO_(2)` is greater than that for `CH_(4)`, it will be easier to liquefy `CO_(2)` gas.
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