“…We reported various thermodynamic property measurements for isobutane [1,2], propane [3,4], n-butane [5,6], and propane/isobutane binary mixture [7] using a metal-bellows variable volumometer. In this study, we measured (p, q, T, x) property data for (x 1 propane + x 2 n-butane) with x 1 = (0.0000, 0.2729, 0.5021, and 0.7308) over a wide range of temperatures from (280 to 440) K at pressures from (1 to 200) MPa using the same apparatus.…”