The standard (p = 0.1 MPa) molar enthalpies of formation of 2-chloroacetophenone and 2,4'-dichloroacetophenone, in the gaseous phase, at T = 298.15 K, were derived from the combination of the values of the standard molar enthalpies of formation in the crystalline phase, at T = 298.15 K, and the standard molar enthalpies of sublimation of each compound, at the same temperature. The standard molar enthalpies of formation, in the crystalline phase, were derived from the corresponding standard massic energies of combustion, in oxygen, at T = 298.15 K, measured by rotating-bomb combustion calorimetry. The standard molar enthalpy of sublimation of 2-chloroacetophenone was measured by Calvet microcalorimetry whereas the standard molar enthalpy of sublimation for 2,4'-dichloroacetophenone was calculated by application of the Clausius Clapeyron equation to the vapor pressures at several temperatures measured by the Knudsen effusion technique.
Compounds
#
Formula
Name
1
ClH
hydrogen chloride
2
CO2
carbon dioxide
3
H2O
water
4
O2
oxygen
5
C8H6Cl2O
2,4'-dichloroacetophenone
6
C8H7ClO
2-chloroacetophenone
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
Vapor or sublimation pressure, kPa ; Crystal
Temperature, K; Crystal
Crystal
Gas
Calculated from knudsen effusion weight loss
36
POMD
6
Molar enthalpy of vaporization or sublimation, kJ/mol ; Crystal
Temperature, K; Crystal
Crystal
Gas
Static calorimetry
1
RXND
6
1
2
3
4
Specific internal energy of reaction at constant volume, J/g
Rotating bomb calorimetry
1
RXND
5
1
2
3
4
Specific internal energy of reaction at constant volume, J/g