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Issue 15, 2002
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Enthalpy of formation of methyl benzoate: calorimetry and consequences

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Methyl benzoate is a particularly simple and important organic compound. We are thus not prepared for the “discovery” that there are three relatively recent literature determinations of its enthalpy of formation that span a 15 kJ mol−1 range. The current study provides yet another, more reliable, measurement of the energy of combustion of this species, −3956.7 ± 3.1 kJ mol−1. Joined with one obtained from the literature a weighted average value for the enthalpy of formation in liquid phase for methyl benzoate can be given as ΔfHm°(l) = −332.8 ± 4.0 kJ mol−1 Combined with a literature suggested value for the enthalpy of vaporization we obtain the standard molar enthalpy of formation of methyl benzoate in gaseous state, ΔfHm°(g) = −276.1 ± 4.0 kJ mol−1. Confident of this new value, we reconcile a disconcerting disparity in the energetics of other methyl benzenecarboxylates discussed in the recent literature.

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The article was received on 27 Feb 2002, accepted on 16 Apr 2002 and first published on 20 Jun 2002

Article type: Paper
DOI: 10.1039/B202033E
Phys. Chem. Chem. Phys., 2002,4, 3611-3613

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    Enthalpy of formation of methyl benzoate: calorimetry and consequences

    M. V. Roux, M. Temprado, J. Z. Dávalos, P. Jiménez, R. S. Hosmane and J. F. Liebman, Phys. Chem. Chem. Phys., 2002, 4, 3611
    DOI: 10.1039/B202033E

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