An adiabatic flow calorimeter was developed for the measurement of the isobaric heat capacity of pure liquids and their mixtures, which could be used over the temperature range of (243 to 393) K and at pressure up to 20 MPa. The apparatus has been validated by measuring the isobaric heat capacity of pure water at different temperatures and pressures. With the flow calorimeter, the isobaric heat capacity of HFE-7200 (1-Ethoxy-1,1, 2,2,3,3,4,4,4-nonafluorobutane, CAS Registry Number: 163702-05-4) and HFE-7500 (3-ethoxyperfluoro(2-methylhexane), CAS Registry Number: 297730-93-9) were measured in the temperature range from ( 245 to 353) K and pressure range from (0.1 to 15) MPa. The expanded uncertainty with a level of confidence of 0.95 (k = 2) of the isobaric heat capacity measurement was estimated to be within 2 % and the repeatability of the experimental data was better than 1 %.
Compounds
#
Formula
Name
1
C6H5F9O
1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane
2
C9H5F15O
2-trifluoromethyl-3-ethoxydodecafluorohexane
3
H2O
water
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
Flow calorimetry
48
POMD
2
Molar heat capacity at constant pressure, J/K/mol ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Flow calorimetry
48
POMD
3
Molar heat capacity at constant pressure, J/K/mol ; Liquid