Question

Which compound in liquid form will have the HIGHEST Vapor pressure? ( Think this through carefully)...

Which compound in liquid form will have the HIGHEST Vapor pressure? ( Think this through carefully)

A) non polar CH3CH3

B) polar CH3C(O)CH3

C) non polar CH4

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Answer #1

Answer is option c, CH4

Vapour pressure can be defined as pressure formed by the vapours of a liquid over the surface of the liquid.

A polar molecule generally have a lower pressure in compare to a non-polar molecule.

The molecule CH4 has lower intermolecular forces of attraction. Hence the boiling point of CH4 is lower in comparison with other options. So more amount of vapour formed at a given temperature. That means, the methane has the highest vapour pressure among given options.

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