Out of pentane, 2-methylbutane and 2,2-dimethylpropane which has the highest boiling point and why?

Out of pentane, 2-methylbutane and 2,2-dimethylpropane which has the h

1.	Out of pentane, 2-methylbutane and 2,2-dimethylpropane which has the highest boiling point and why?
Answer» Pentane having a continuous chain of five carbon atoms has the highest boiling point (309.1K) whereas 2,2 – dimethylpropane boils at 282.5K. With increase in number of branched chains, the molecule attains the shape of a sphere. This results in smaller area of contact and therefore weak intermolecular forces between spherical molecules, which are overcome at relatively lower temperatures.

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Out of pentane, 2-methylbutane and 2,2-dimethylpropane which has the highest boiling point and why?

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