An equation of state that predicts the thermodynamic behavior of propane is formulated. This equation takes into account the global behavior that includes the singular thermodynamic behavior asymptotically close to the critical point and the crossover to the regular thermodynamic behavior far away from the critical point. The formulated equation based on the transformation of a truncated classical Landau expansion. This equation of state (EOS) can represent the thermodynamic properties of propane in a wide range of temperatures and densities around the critical point. Comparisons of the pressure P–ρ–T data measured by Mark Mclinden of NIST group calculated with crossover EOS and those computed by the EOS of Eric Lemmon and selected results of other experimentalists are presented, as well as the isochoric-specific heat data measured by Abdulagatov et al. of the Russian groups are presented. We also give the comparison with a set of isobaric-specific heat data of Yesavage et al. The description of the rectilinear diameter singularity near the critical point is also discussed.

制定了预测丙烷热力学行为的状态方程。该方程考虑了整体行为，其中包括渐近接近临界点的奇异热力学行为和远离临界点的常规热力学行为的交叉。该公式基于截断的经典Landau展开的变换。该状态方程（EOS）可以代表丙烷在临界点附近的各种温度和密度下的热力学性质。的压力的比较P - ρ - Ť介绍了由NIST组的Mark Mclinden测量的，通过交叉EOS计算的数据以及通过Eric Lemmon的EOS计算的数据以及其他实验者的选定结果，以及Abdulagatov等人测量的等渗比热数据。介绍了俄罗斯团体。我们还与Yesavage等人的一组等压比热数据进行了比较。还讨论了临界点附近的直线直径奇异性的描述。