Speed of sound and ideal-gas heat capacity at constant pressure of gaseous trifluoroiodomethane (CF3I)
Speed of sound and ideal-gas heat capacity at constant pressure of gaseous trifluoroiodomethane (CF3I)
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DOI：
10.1016/s0378-3812(97)00152-0
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发表时间：
1997-11-01
影响因子：
2.6
通讯作者：
Han, LZ
中科院分区：
文献类型：
--
作者：
Duan, YY;Sun, LQ;Han, LZ
用一台工作频率为156.252 kHz的圆柱形变程声干涉仪测量了温度为273.15 ~ 333.15 K、压力为58 ~ 276 kPa的三氟碘甲烷（CF_3I）气体的声速。声速的不确定度小于+/-0.1%。在恒定压力下的理想气体的热容和第二维里系数的温度范围内确定的声速测量。根据声速测量结果计算出的理想气体定压热容和第二维里系数与现有数据进行了比较。理想气体定压热容的不确定度估计小于+/-1%。(C)1997年Elsevier Science B.V.
The speed of sound of the gaseous trifluoroiodomethane (CF3I) was measured for temperatures from 273.15 to 333.15 K and pressures from 58 to 276 kPa with a cylindrical, variable-path acoustic interferometer operating at 156.252 kHz. The uncertainty of the speed of sound was less than +/-0.1%. The ideal-gas heat capacity at constant pressure and the second acoustic virial coefficients were determined over the temperature range from the speed of sound measurements. The ideal-gas heat capacity at constant pressure and second virial coefficients calculated from the present speed of sound measurements were compared with the available data. The uncertainty of the ideal-gas heat capacity at constant pressure was estimated to be less than +/- 1%. (C) 1997 Elsevier Science B.V.