Volumetric behaviour of the (2,2,4-trimethylpentane + methylbenzene + butan-1-ol) ternary system and its binary sub-systems within the temperature range (298.15–328.15) K

Densities and speeds of sound of the (2,2,4-trimethylpentane + methylbenzene + butan-1-ol) ternary system as well as all its binary sub-systems were measured at four temperatures, namely 298.15 K, 308.15 K, 318.15 K, and 328.15 K at atmospheric pressure by a vibrating-tube densimeter DSA 5000. The binary (isooctane + toluene) system was studied previously. Excess quantities (molar volume, adiabatic compressibility, and isobaric thermal expansivity) of the mixtures studied were calculated from the experimental densities and speed of sounds. The excess molar volume data were correlated using the Redlich–Kister equation. Both the positive and S-shaped excess molar volume curves were found for the systems studied. The excess molar volumes versus concentration of binary systems differed in the shape and temperature dependence. The experimental binary data were compared with literature data. The experimental excess molar volumes were analyzed by means of the Extended Real Associated Solution (ERAS) model. The experimental data and the ERAS model can help to estimate real behaviour of the systems studied.     

邻、间、对二甲苯及乙苯与四氢呋喃的过量体积

在 2 98 15K下用振动管密度计在全浓度范围内测量了四氢呋喃分别与邻二甲苯、间二甲苯、对二甲苯和乙苯构成二元混合物的过量摩尔体积VE。这 4个二元混合物的过量体积VE 值均为负值 ,大小顺序为 :间二甲苯 >乙苯 >邻二甲苯 >对二甲苯     

醇+N-甲基哌嗪二元体系的体积性质

采用振荡管式数字密度计分别测定甲醇、乙醇、正丙醇、异丙醇、丁正醇和异丁醇与N-甲基哌嗪组成的二元体系在298.15K下的密度，计算了超额摩尔体积、超额偏摩尔体积、表观摩尔体积、偏摩尔体积等体积性质，从分子相互作用角度讨论了这些二元体系的体积性质的变化规律，为N-甲基哌嗪的开发和研究提供基础数据和信息。     

密度在线测量中的核技术仪表

提出了密度计组成，原理及在工业现场测试数据，该密度计是核技术应用范例     

The Temperature Dependence of the Resistivity and Thermopower in Some Polyvalent Liquid Metals

Abstract

Calculations of the temperature dependence of the resistivity and thermopower of liquid indium, cadmium, thallium, lead and mercury are presented. The values of the thermopower are in better agreement with experiment than the results of previous calculations. The success and validity of the Ziman nearly-free-electron theory is discussed in connection with the results for the resistivity.     

桉叶油素与CCl4，CHCl3的过量体积

在 2 98 15K和 30 8 15K下用振动管密度计在全浓度范围内测量了桉叶油素分别与四氯化碳和三氯甲烷构成的二元系的过量摩尔体积 .这 2个二元系的过量摩尔体积均为负值 ,且桉叶油素与氯仿的过量体积显著大于桉叶油素与四氯化碳的过量体积 .     

叔丁基甲醚与二甲苯异构体的过量摩尔体积

在298．15K和308．15K下用振动管密度计在全浓度范围内测量了叔丁基甲醚(TBME)分别与邻二甲苯、间二甲苯、对二甲苯和乙苯构成二元混合物的过量摩尔体积V^E。这4个二元混合物的V^E均为负值，顺序为：间二甲苯＞对二甲苯＞乙苯＞邻二甲苯。     

氯仿、硝基苯与三甲苯异构体的过量摩尔体积

在298.15 K下,用振动管密度计在全浓度范围内测量了氯仿、硝基苯分别与均三甲苯、偏三甲苯构成的二元液体混合物的过量摩尔体积VE.其中氯仿与均、偏三甲苯的VE为正值,且均三甲苯＞偏三甲苯;硝基苯与均、偏三甲苯的VE为负值,且偏三甲苯＞均三甲苯.     

(p, ρ, T) properties, and apparent molar volumes V? of ZnBr2 in methanol at T = (298.15 to 398.15) K and pressures up to p = 40 MPa

The (p, ρ, T) properties of pure methanol, the (p, ρ, T) properties and apparent molar volumes V_? of ZnBr₂ in methanol at T = (298.15 to 398.15) K and pressures up to p = 40 MPa are reported, and apparent molar volumes have been evaluated. The experimental (p, ρ, T, m) values were described by an equation of state. For the solutions the experiments were carried out at molalities m = (0.05772, 0.37852, 0.71585 and 1.95061) mol · kg⁻¹ of zinc bromide.