Isobutane is more thermodynamically stable than n-butane due to differences in branching and steric effects.
Isobutane is more thermodynamically stable than n-butane due to the energetic differences arising from chain branching and conformational stability.
The retrieved papers examine the thermodynamic properties, isomerization, and standard enthalpies of formation of n-butane and isobutane. Chemical thermodynamic principles confirm that branched isomers like isobutane are slightly more stable at standard conditions due to reduced strain and favorable conformational enthalpy contributions, supported by studies like [1] and [3].
S. S. Chen, R. C. Wilhoit, B. J. Zwolinski. Ideal gas thermodynamic properties and isomerization of <i>n</i>-butane and isobutane. 1975. https://doi.org/10.1063/1.555526
This study evaluates the standard enthalpies of formation and thermodynamic properties for both n-butane and isobutane.
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John T. Edward. Conformational effects on the enthalpy of formation of straight and branched-chain alkanes. 1981. https://doi.org/10.1139/v81-466
This study modifies group-additivity schemes for the enthalpy of formation of branched alkanes by accounting for conformational and steric effects.
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