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Springerplus. 2013 Dec;2(1):98. Epub 2013 Mar 9.

Standard molar enthalpy of combustion and formation of quaternary ammonium tetrachlorozincate [n-CnH2n+1 N(CH3)3]2 ZnCl4.

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  • 1Department of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, 050024 China.


The standard molar enthalpy of combustion (Δc H o m) and formation (Δf H o m) of quaternary ammonium tetrachlorozincate [n-CnH2n+1N(CH3)3]2ZnCl4 have been determined for the hydrocarbon chain length from even number 8 to 18 of carbon atoms (n) by an oxygen-bomb combustion calorimeter. The results indicated that the values of Δc H o m increased and Δf H o m decreased with increasing chain length and showed a linear dependence on the number of carbon atoms, which were caused by that the order and rigidity of the hydrocarbon chain decreased with increasing the carbon atoms. The linear regression equations are -Δc H o m =1440.50n +3730.67 and -Δf H o m = -85.32n + 1688.22.


Combustion calorimeter; Energy of combustion; Enthalpy of combustion; Enthalpy of formation; Quaternary ammonium tetrachlorozincate

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