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在308．15和318．15K温度下，80－170bar压力范围内，测定了CO2-乙醇、CO2-丙酮和CO2-正庚烷混合物的密度，溶质的浓度范围是0－1．3mol·L－1．在此基础上，计算了溶质的偏摩尔体积，系统地研究了温度、压力和溶质浓度对二元混合物密度的影响，并从压力和溶质浓度对溶质偏摩尔体积影响的角度研究体系中的分子间相互作用．
The density of CO2-ethanol, CO2-acetone and CO2-n-heptane mixtures was measured at pressures of 80-170 bar at 308.15 and 318.15 K, and the solute concentrations ranged from 0 to 1.3 mol·L- 1. On this basis, the partial molar volume of solute was calculated and the effects of temperature, pressure and solute concentration on the density of binary mixtures were systematically investigated. The effects of pressure and solute concentration on the partial molar volume of solute were also investigated. Interactions.