Question
Asked Dec 20, 2019
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The molar heat of combustion of gaseous cyclopropane is -2089 Kj/mol, that for gaseous cyclopentene is -3317 Kj/mol. Calculate the heat of combustion per CH2 group in the two cases and account for the difference

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Expert Answer

Step 1

The structure of cyclopropane is

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CH, CH, Н.С

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Step 2

There are three CH2 groups in the molecule of cyclopropane. Molar heat of combustion per CH2 group is

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AH for cyclopropane = -2089kJ/mol there are 3 CH, groups therefore -2089kJ AH per CH, group of cyclopropane= 3mol = -696.3kJ/mol

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Step 3

The structure of cyc...

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Cн, CH, Н.С — Сн, - CH, Н.С-

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