Experimental and theoretical studies of the crossover behavior of the specific heat Cv,x of ethane,propane, and their mixture at critical isochores |
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Authors: | I. M. Abdulagatov S. B. Kiselev L. N. Levina Z. R. Zakaryaev O. N. Mamchenkova |
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Affiliation: | (1) Institute for Geothermal Problems of the Dagestan Scientific Center of the Russian Academy of Sciences, Kalinina Ave. 39-A, 367030 Makhachkala, Dagestan, Russia;(2) Institute of Oil and Gas Research of the Russian Academy of Sciences, Leninsky Prospect 65, 117917 Moscow, Russia |
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Abstract: | The specific heat at constant volume, Cv, of propane, and mixture with a concentration ofx=0.0081 cool 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 forC, obtained on the basis of the renormalization-group method and -expansion are applied to represent our experimental specific heat data for ethane, propane. and its mixture along the critical isochores. |
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Keywords: | critical phenomena crossover equation ethane propane specific heat |
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