The specific heat at constant volume, C~, of propane, and mixture with a concentration of.x-= 0.0081 mol fraction of propane was measured along the critical isochores at temperatures between 290 and 400 K. The measurements were performed with a high-temperature constant-volume adiabatic calorimeter. The uncertainty of most of the measurements is estimated to be less than 1.5%. Measurements have been carried out in both the one-and two-phase regions. The results for the pure components are compared with earlier measurements. Crossover equations for Cv obtained on the basis of the renormalization-group method and e-expansion are applied to represent our experimental specific heat data for ethane, propane, and its mixture along the critical isochores.
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