Isobarlc Heat Capacity Data for Liquid HCFC-123 (CHCI₂CF₃, 2,2-Dlchloro-1,1, 1-trlfluoroethane)

The Isobarlc heat capacity, C_p, of liquid 2,2-dtehloro-1,1,1-trlfluoroethane Cp,(CHCl₂CF₃ HCFC-123), which Is a promising alternative to CFC-11, has been measured by using flow calorimetry. The values of 80 C_phave been determined In the range of temperatures from 275.85 to 440 K and pressures from 0.5 to 3.2 MPa, respectively. The overall uncertainties of the determined C_p values are concluded to be less than ±0.4% for temperatures below 420 K, ±0.5% at 430 K, ±0.8% at 440 K, respectively. The C_p data have been correlated with a function of temperature and pressure within ±0.4%, and the C_p of saturated liquid, C_p, have been derived from the correlation.