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The paper presents 96 PνTx vapor phase data values for binary blends of 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and isobutane (R600a) and 102 PνTx vapor phase data values for binary blends of trans-1,3,3,3-tetrafluoroprop-1-ene (R1234ze(E)) and R600a. The R1234yf/ R600a blends were measured for five isochores (0.0751, 0.0944, 0.1280, 0.1666, 0.1701) m 3 •kg −1 for (303 < T < 383) K for six R600a mole fractions (0.234, 0.400, 0.472, 0.606, 0.772, 0.850) mol•mol −1 . The R1234ze(E)/ R600a blends were measured for four isochores (0.0852, 0.0894, 0.1006, 0.1064) m 3 •kg −1 for (303 < T < 383) K for six R600a mole fractions (0.290, 0.428, 0.516, 0.612, 0.685, 0.755) mol•mol −1 . The data were fitted with a fundamental Helmoltz equation of state (EoS), a Peng−Robinson EoS, and a truncated virial EoS.

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The paper presents 86 PvTx measurements in the vapor phase for blends of 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and propane and 62 PvTx measurements in the vapor phase for blends of cis-1,2,3,3,3-pentafluoroprop-1-ene (R1225ye­(Z)) and propane. The R1234yf and propane blends were measured along four isochores (0.047, 0.048, 0.072, 0.095) m3·kg–1 for (268 < T < 363) K for four propane mole fractions (0.230, 0.505, 0.611, 0.709) mol·mol–1. The R1225ye­(Z) and propane blends were measured along five isochores (0.032, 0.038, 0.042, 0.067, 0.090) m3·kg–1 for (303 < T < 363) K for five propane mole fractions (0.225, 0.516, 0.593, 0.690, 0.855) mol·mol–1. The data are well-predicted when fitted (1) with Fundamental Helmoltz Equations of State (EoS), Peng–Robinson EoS, and Extended Corresponding States EoS when each are coupled with a modified van der Waals one-fluid linear mixing model, and (2) with a truncated Virial EoS.

This paper provides eighty-four PvTx data points for binary blends of trans-1-chloro-3,3,3-trifluoroprop-1-ene (R1233zd­(E)) and isobutane (R600a) in the vapor phase and ninety-seven PvTx data points for binary blends of cis-1,3,3,3-tetrafluoroprop-1-ene (R1234ze­(Z)) and R600a in the vapor phase. The R1233zd­(E)/R600a data were recorded along six isochores (0.0499, 0.0536, 0.0927, 0.1263, 0.1431, 0.1744) m3·kg–1 for temperatures (303 < T < 383) K for six R600a mole fractions (0.125, 0.453, 0.564, 0.644, 0.746, 0.865). The R1234ze­(Z)/R600a blends were recorded along five isochores (0.0759, 0.0907, 0.1272, 0.1288, 0.1520) m3·kg–1 for temperatures (303 < T < 383) K for six R600a mole fractions (0.118, 0.222, 0.427, 0.510, 0.658, 0.725). The data were regressed using several equations of state.