Vapor-Liquid Equilibria for the Binary System Pentafluoroethane (HFC-125) + Isobutane (HC-600a) at Temperatures from (243.15 to 333.15) K Chen, J.X.; Chen, Z.S.; Hu, P.; Jiang, B.; Li, Z.H.; Journal of Chemical & Engineering Data 2007, 52, 2159-2162