11. Which of the following hydrocarbons would you expect to have the highest boiling point? 1. ethane
2. butane
3. methyl butane
4. octane

Ethane should be the answer!

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.