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Density, Viscosity, Refractive Index, Isobaric Specific Heat Capacity, Ultrasonic Velocity, Molar Volume, Isentropic Compressibility, Isothermal Compressibility, and Heat Capacity Ratio for Binary Mixtures of the Organic Liquids Ethylbenzene, Ethylcyclohexane, Pentylbenzene, and Pentylcyclohexane at 298.15 K and 0.1 MPa
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-05-01 , DOI: 10.1021/acs.jced.1c00649
Gerald R. Van Hecke 1 , Oliver W. M. Baldwin 1 , Brandon C. Wada 1
Affiliation  

Ethylbenzene, ethylcyclohexane, pentylbenzene, and pentylcyclohexane, both pure and binary mixtures, were studied to ascertain the effects of the molecular structure and the physical properties of the pure components on resultant properties of the binary mixtures. Density, viscosity, refractive index, isobaric specific heat capacity, and ultrasonic velocity were measured for the pure materials and for the six possible binary mixtures of the four hydrocarbons. Molar volume, isentropic compressibility, isothermal compressibility, and heat capacity ratio were calculated from the measured quantities. Deviations from ideality were determined as either excess or increment values for each physical property for each mixture. The sign and magnitude of the deviation values varied depending on the property and the mixture. The isothermal compressibility was successfully calculated from the isentropic compressibility using a well-known thermodynamic relationship. The isentropic compressibility was found to be almost a linear function of mixture composition and the difference between the isothermal and isentropic compressibilities was also found to be a smooth function of mixture composition. The difference only varies between 0.15 and 0.22 GPa–1 depending on the specific binary mixture. The heat capacity ratio was found to be a smooth, almost linear function of composition.

中文翻译:

在 298.15 K 和 0.1 MPa 下有机液体乙苯、乙基环己烷、戊苯和戊基环己烷的二元混合物的密度、粘度、折射率、等压比热容、超声速度、摩尔体积、等熵压缩率、等温压缩率和热容比

研究了纯和二元混合物的乙苯、乙基环己烷、戊基苯和戊基环己烷,以确定分子结构和纯组分的物理性质对二元混合物最终性质的影响。测量纯材料和四种碳氢化合物的六种可能二元混合物的密度、粘度、折射率、等压比热容和超声速度。摩尔体积、等熵可压缩性、等温可压缩性和热容比由测量值计算。与理想的偏差被确定为每种混合物的每种物理性质的过量值或增量值。偏差值的符号和大小因性质和混合物而异。使用众所周知的热力学关系从等熵压缩率成功地计算出等温压缩率。发现等熵压缩率几乎是混合物成分的线性函数,并且等温和等熵压缩率之间的差异也被发现是混合物成分的平滑函数。差异仅在 0.15 和 0.22 GPa 之间变化–1取决于具体的二元混合物。发现热容比是组成的平滑、几乎线性的函数。
更新日期:2022-05-01
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