THERMODYNAMIC PROPERTIES OF 2 GASEOUS HALOGENATED ETHERS FROM SPEED-OF-SOUND MEASUREMENTS - DIFLUOROMETHOXY-DIFLUOROMETHANE AND 2-DIFLUOROMETHOXY-1,1,1-TRIFLUOROETHANE
Ka. Gillis, THERMODYNAMIC PROPERTIES OF 2 GASEOUS HALOGENATED ETHERS FROM SPEED-OF-SOUND MEASUREMENTS - DIFLUOROMETHOXY-DIFLUOROMETHANE AND 2-DIFLUOROMETHOXY-1,1,1-TRIFLUOROETHANE, International journal of thermophysics, 15(5), 1994, pp. 821-847
We present measurements of the speed of sound in gaseous difluorometho
xydifluoromethane (CHF2-O-CHF2) and 2-difluoromethoxy-1,1,1-trifluoroe
thane (CF3-CH2-O-CHF2). These measurements were performed in an all-me
tal apparatus between 255 and 384 K. We have obtained ideal-gas heat c
apacities and second acoustic virial coefficients from analysis of the
se measurements. Two methods of correlating the second acoustic virial
coefficients, a square well model of the intermolecular interaction a
nd a function due to Fitter and Curl, are presented.