The standard op 1/4 0:1 MPaP molar enthalpies of formation, at T 1/4 298:15 K, in the condensed phases of two alkylpyrazoles, viz. 3-methylpyrazole and 1,3,5-trimethylpyrazole, were determined by static bomb calorimetry. Calvet microcalorimetry was used to measure the standard molar enthalpy of vaporisation of 1-methylpyrazole and the standard molar enthalpy of sublimation of 1,3, 5-trimethylpyrazole. From these two sets of results, the standard molar enthalpies of formation of both alkylpyrazoles in gaseous phase, at T 1/4 298:15 K, were derived. The final results were analysed and discussed in terms of molecular structure.
Compounds
#
Formula
Name
1
CO2
carbon dioxide
2
N2
nitrogen
3
H2O
water
4
O2
oxygen
5
C4H6N2
3-methylpyrazole
6
C6H10N2
1,3,5-trimethylpyrazole
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 transition or fusion, kJ/mol ; Liquid
Temperature, K; Liquid
Liquid
Gas
Calvet calorimetry with correction to 298 K for gas heat capacity
1
POMD
6
Molar enthalpy of transition or fusion, kJ/mol ; Crystal
Temperature, K; Crystal
Crystal
Gas
Calvet calorimetry with correction to 298 K for gas heat capacity
1
RXND
5
1
2
3
4
Specific internal energy of reaction at constant volume, J/g
Static bomb calorimetry
1
RXND
6
1
2
3
4
Specific internal energy of reaction at constant volume, J/g