Heat-capacity measurements and thermodynamic functions of 1,3,5-triazine and 1,3,5-trioxane

The molar heat capacities of ▪ (1,3,5-triazine) and of ▪ (1,3,5-trioxane) were measured between 10 and 350 K. Derived thermodynamic functions are given. The molar enthalpies of fusion were found to be (14560±10) J·mol −1 and (15105±10) J·mol −1, respectively. The corresponding melting temperatures a...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 1988-04, Vol.20 (4), p.397-403
Main Authors: Van Bommel, M.J, Van Miltenburg, J.C, Schuijff, A
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Elements, mineral and organic compounds
Exact sciences and technology
General and physical chemistry
General. Theory
Metals and alloys
Mixtures
Thermodynamic properties
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Summary:The molar heat capacities of ▪ (1,3,5-triazine) and of ▪ (1,3,5-trioxane) were measured between 10 and 350 K. Derived thermodynamic functions are given. The molar enthalpies of fusion were found to be (14560±10) J·mol −1 and (15105±10) J·mol −1, respectively. The corresponding melting temperatures are 353.44 K and 333.44 K. The transition in 1,3,5-triazine at 197.7 K is discussed. Assuming the phase transition to be of second order and using the heat capacities of 1,3,5-trioxane for calculating the base line, a value of 362.8 J·mol −1 for the molar enthalpy of transition was found.
ISSN:0021-9614
1096-3626
DOI:10.1016/0021-9614(88)90176-0