文献类型：期刊文献

英文题名：Critical behavior of binary mixture of {(1 - X) C6H 5CN + x CH3(CH2)9CH3}: Measurements of coexistence curves, turbidity, and heat capacity

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

机构：[1] School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] Department of Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China; [3] Department of Basic Science, China Pharmaceutical University, Nanjing, Jiangsu 210009, China

年份：2012

卷号：53

起止页码：42

外文期刊名：Journal of Chemical Thermodynamics

收录：EI(收录号：20122515134440)

语种：英文

外文关键词：Specific heat - Binary mixtures - Aromatic compounds

摘要：(Liquid + liquid) coexistence curve, turbidity, and isobaric heat capacity per unit volume for the critical solution of {benzonitrile + n-undecane} have been measured. The critical exponents β, ν, γ, and α have been deduced, which were found to be consistent with the theoretic predictions. Meanwhile, the experimental data have also been analyzed to obtain the system-dependent critical amplitudes B, ξ0, χ0, A±, and D corresponding to the difference of the general density variable of two coexisting phases Δρ, the correlation length ξ, the osmotic compressibility χ, the isobaric heat capacity per unit volume CpV-1, and the first term of correction-to-scaling for the isobaric heat capacity per unit volume, which were used to test some universal ratios. It was found that the coexistence curve may be well described by the crossover model proposed by Gutkowski et al. The critical-fluctuation induced contribution to the background heat capacity Bcr was obtained and used to analyze the asymmetric behavior of the diameter of the coexistence curve. The result indicated that the asymmetry of the coexistence curve can be well described by the complete scaling theory proposed by Anisimov et al., and the heat capacity does make a significant contribution to this asymmetric behavior. ? 2012 Elsevier Ltd. All rights reserved.