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Standard enthalpy of formation of 3,4,5-trimethoxybenzoic acid

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Abstract

The energy of combustion of crystalline 3,4,5-trimethoxybenzoic acid in oxygen at T=298.15 K was determined to be -4795.9±1.3 kJ mol-1 using combustion calorimetry. The derived standard molar enthalpies of formation of 3,4,5-trimethoxybenzoic acid in crystalline and gaseous states at T=298.15 K, ΔfHm Θ (cr) and ΔfHm Θ (g), were -852.9±1.9 and -721.7±2.0 kJ mol-1, respectively. The reliability of the results obtained was commented upon and compared with literature values.

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Authors and Affiliations

  1. Department of Chemistry, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R., China

    H. G. Yu Yu, J. X. Dong, Y. Liu & S. S. Qu

  2. Department of Chemistry, Xiaogan University, Xiaogan, 432100, P. R. China

    C. Q. Qin

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  1. H. G. Yu Yu
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  2. J. X. Dong
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  3. C. Q. Qin
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  4. Y. Liu
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  5. S. S. Qu
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Correspondence to Y. Liu.

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Yu, H.G.Y., Dong, J.X., Qin, C.Q. et al. Standard enthalpy of formation of 3,4,5-trimethoxybenzoic acid. Journal of Thermal Analysis and Calorimetry 75, 807–813 (2004). https://doi.org/10.1023/B:JTAN.0000027177.82750.84

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  • DOI: https://doi.org/10.1023/B:JTAN.0000027177.82750.84

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