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Which statement best compares the melting point of butane (C4H10) with that of octane (C8H18)? The melting points of both substances are identical. The melting point is lower for the substance that has stronger attractive forces. The melting point is higher for the substance that has stronger intermolecular forces. The melting point is not dependent on intermolecular forces.

Mindee Nelson

in Chemistry

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Carlton Burgess on September 6, 2018

The third answer is the correct one. Both butane and gasoline are straight-chain alkenes, so that the only variable relevant that affect their melting points is the difference in the length of the string. The octane rating is already more intermolecular forces (London Forces specifically) arise. Therefore, more energy input is required to break these attractions, so that the boiling point is higher


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