NIST TRC ThermoML Dataset

(Vapour + liquid) equilibrium data for the azeotropic {1,1-difluoroethane (R152a) + 1,1,2,2-Tetrafluoroethane (R134)} system at various temperatures from (258.150 to 288.150)K Guo, H.; Gong, M.; Dong, X.; Wu, J.; The Journal of Chemical Thermodynamics 2012, 54, 129-133

Journal: The Journal of Chemical Thermodynamics
Sample Quantity(ies): Azeotropic composition: mole fraction
Methodology: By X=Y
Phase(s): Liquid
Substances:
1. 1,1-difluoroethane C2H4F2 (NPNPZTNLOVBDOC-UHFFFAOYSA-N) - Commercial source
2. 1,1,2,2-tetrafluoroethane C2H2F4 (WXGNWUVNYMJENI-UHFFFAOYSA-N) - Commercial source

Data

T (K)	x_az (mol mol^-1)
258.150	0.146
268.150	0.166
278.150	0.156
288.150	0.163

40733; 1,1-difluoroethane + 1,1,2,2-tetrafluoroethane; 00804:01429