Carbon–carbon bond dissociation enthalpies have been measured for many alkanes. Without re...

Carbon–carbon bond dissociation enthalpies have been measured for many alkanes. Without referring to Table 10.1, identify the alkane in each of the following pairs that has the lower carbon-carbon bond-dissociation enthalpy, and explain the reason for your choice.

(a) Ethane or propane

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(b) Propane or 2-methylpropane

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(c) 2-Methylpropane or 2,2-dimethylpropane

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(d) Cyclobutane or cyclopentane

TABLE 10.1 Some Bond Dissociation Enthalpies*