Isobaric Heat Capacity Measurements for Dimethyl Ether and 1,1-Difluoroethane in the Liquid Phase at Temperatures from 305 K to 365 K and Pressures up to 5 MPa
The isobaric heat capacity of dimethyl ether and 1,1-difluoroethane in liquid phase were measured at temperatures from 305 K to 365 K and pressures up to 5 MPa. A heat conduction calorimeter was applied in the measurements and a total of 81 data points for dimethyl ether and 78 data points for 1,1-difluoroethane were obtained. The uncertainties of measured heat capacity were estimated to be 2.1% for dimethyl ether and 1.8% for 1,1-difluoroethane, respectively. To reproduce the experimental data, a uniform equation was proposed. The equation showed average absolute deviations of 0.17 % for dimethyl ether and 0.30 % for 1,1-difluoroethane from the experimental values. Saturated liquid heat capacities for both experimental subjects were also obtained by extrapolating the equation to saturated pressures. Finally, comparisons have been done between our experimental data and literature data and fundamental equation of states.
Compounds
#
Formula
Name
1
C2H6O
dimethyl ether
2
C2H4F2
1,1-difluoroethane
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
1
Molar heat capacity at constant pressure, J/K/mol ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Twin Calvet
81
POMD
2
Molar heat capacity at constant pressure, J/K/mol ; Liquid