文献类型：期刊文献

英文题名：Critical behaviour of binary mixture of {xC6H5CN + (1 - X)CH3(CH2)7CH3}: Measurements of coexistence curves, light scattering, and heat capacity

作者：Lei, Yuntao[1]; Chen, Zhiyun[2]; Wang, Nong[1,2]; Mao, Chunfeng[1]; An, Xueqin[2,3]; Shen, Weiguo[1,2]

机构：[1] Department of Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China; [2] School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; [3] Jiangsu Key Laboratory of Biofunctional Materials, Nanjing Normal University, Nanjing 210097, China

年份：2010

卷号：42

期号：7

起止页码：864

外文期刊名：Journal of Chemical Thermodynamics

收录：EI(收录号：20103213134672)

语种：英文

外文关键词：Binary mixtures - Liquids - Specific heat - Aromatic compounds - Mean field theory

摘要：Liquid + liquid coexistence, light scattering, and isobaric heat capacity per unit volume for the critical solutions of (benzonitrile + n-nonane) have been measured. The critical exponents relating to the coexistence curve β, the osmotic compressibility γ, the correlation length ν, and the heat capacity α have been deduced and the values are consistent with the 3D-Ising values in the range close to the critical point. The experimental results of the liquid + liquid coexistence were analyzed to examine the Wegner correction terms and the behaviour of the diameter of the coexistence curves. The light scattering data were well described by the crossover model proposed by Anisimov and Sengers, and showed a tendency of monotonic crossover of the critical exponents γ and ν from the 3D-Ising values to the mean-field values as the temperature departures from the critical point. From calorimetric measurements, the amplitude A± and the critical background Bcr of the heat capacity in the critical region have been deduced and some universal ratios are tested. ? 2010 Elsevier Ltd. All rights reserved.