Lower alcohols like methanol burn with a blue flame to form carbon dioxide and water in the presence of atmosphere oxygen. Such a type of reaction is called A. oxidation B. combustion C. dehydration D. esterfication​

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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.