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Some thermodynamic properties of the system formic acid‐water
Author(s) -
Plewes A. C.,
Pei D. C.,
Code R. K.
Publication year - 1959
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450370308
Subject(s) - formic acid , chemistry , mixing (physics) , enthalpy , thermodynamics , exothermic reaction , monomer , vaporization , enthalpy of vaporization , chromatography , organic chemistry , polymer , physics , quantum mechanics
The integral latent heats of vaporization of formic acid‐water mixtures at 760 mm. Hg. are reported and used to prepare an enthalpy‐concentration chart for the system. The data provided a basis for the estimation of the heats of mixing in the vapor phase, and the results indicate that the exothermic heat of mixing may be attributed to the partial dimerization of monomeric formic acid coupled with the association of water and acid molecules. Vapor‐liquid equilibria data for the system are also reported.