This paper reports the values of the standard (p = 0.1 MPa) molar enthalpies of formation, in the gaseous phase, DfH mogP, at T = 298.15 K, of 2,5-dimethylthiophene and 3-acetyl-2,5-dimethylthiophene as (50.6 +- 1.9) kJ mol 1 and (123.2 +- 2.7) kJ mol 1, respectively. These values were derived from experimental thermodynamic parameters, namely, the standard molar enthalpies of formation, in the liquid phase, DfH m olP, at T = 298.15 K, obtained from the standard molar enthalpies of combustion, DcH m, measured by rotating bomb combustion calorimetry, and from the standard molar enthalpies of vaporization, Dgl H m, at T = 298.15 K, measured by high temperature Calvet microcalorimetry. The results are interpreted in terms of enthalpic increments, molecular structure and compared with structurally similar compounds.
Compounds
#
Formula
Name
1
H2O4S
sulfuric acid
2
CO2
carbon dioxide
3
H2O
water
4
O2
oxygen
5
C6H8S
2,5-dimethylthiophene
6
C8H10OS
3-acetyl-2,5-dimethylthiophene
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
5
Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
Temperature, K; Liquid
Liquid
Gas
Calvet microcalorimetry
1
POMD
5
Molar enthalpy, kJ/mol ; Gas
Temperature, K; Gas
Pressure, kPa; Gas
Gas
Vacuum drop calorimetry
1
POMD
6
Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
Temperature, K; Liquid
Liquid
Gas
Vacuum drop calorimetry
1
POMD
6
Molar enthalpy, kJ/mol ; Gas
Temperature, K; Gas
Pressure, kPa; Gas
Gas
Vacuum drop calorimetry
1
RXND
5
1
2
3
4
Specific internal energy of reaction at constant volume, J/g
Rotating bomb calorimetry
1
RXND
6
1
2
3
4
Specific internal energy of reaction at constant volume, J/g