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Thermophysics and Aeromechanics

2008 year, number 3

Speed of sound and ideal-gas heat capacity of freon R-236ea

S.G. Komarov1, V.A. Gruzdev2, S.V. Stankus3
1 Kutateladze Institute of Thermophysics SB RAS, gamma@itp.nsc.ru
2 Kutateladze Institute of Thermophysics SB RAS
3 Kutateladze Institute of Thermophysics SB RAS
Keywords: R-236ea, vapor, speed of sound, ideal-gas heat capacity, ultrasonic interferometer
Pages: 369-371

Abstract

Speed of sound in the gaseous freon R-236ea with the purity of 99.68 mol. % has been measured by the method of ultrasonic interferometer in the range from 263 to 423 K and at pressures from 17 kPA to 4.2 MPa. Errors of temperature, pressure, and speed of sound measurement were estimated to be within +/- 20 mK, ± 1.5 kPa, and ±(0.1+0.2) % respectively. Temperature dependence of ideal-gas heat capacity of R-236ea has been calculated on the basis of the obtained data.