Question: 1. Why is there a difference in boiling point between pentane (36.06 celsius), 2-methylbutane (27.83 celsius), 2,2-dimethylpropane (9.5 celsius)? 2. Why is there a difference

1. Why is there a difference in boiling point between pentane (36.06 celsius), 2-methylbutane (27.83 celsius), 2,2-dimethylpropane (9.5 celsius)?
2. Why is there a difference in boiling point between Trans 1,2-dichloroethene (55 celsius) and Cis 1,2-dichloroethene (60 celsius)?

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