The heats of combustion (-H ° ) of heptane and 3,3-dimethypentane are 4,817 and

Question

The heats of combustion (-H°) of heptane and 3,3-dimethypentane are 4,817 and 4,809 kJ/mol, respectively. Which statement is true?

The heats of combustion (-delta H degree) of heptane and 3, 3-dimethypentane are 4.817 and 4.809 kJ/mol, respectively. Which statement is true? Heptane is 8 kJ/mol more stable then 3, 3-dimethylpentane. 3.3-Dimethylpentane is 8 kJ/mol more stable than heptane. Stabilities cannot be compared since they are not isomers. Stabilities cannot be compared since they give different combustion products.

Explanation / Answer

Answer is

B). 3,3-Dimethylpentane is 8 kJ/mol more stable then heptane

as heptane is more likely to combust earlier due to more negative heat.

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