拟静态法测定混和溶剂的汽化热和汽化熵

Quasi-static Method for the Determination of the Heat and Entropy of Vaporization of the Solvent Mixture

讨论了沸点升高法测定混和溶剂汽化热和汽化熵的原理，并用拟静态法测定了乙醇－丙酮，苯－四氯化碳和苯－甲苯三组混和溶剂在不同组成下的正常沸点，根据沸点数据求得了混和溶剂的微分汽化热和汽化熵．实验结果表明，二元混和溶剂与理想溶液偏离不大时，其正常汽化熵符合Trouton规则．

The principles of the method of boiling point elevation with which the heat and entropy of vaporization of solvent drixture are deterInined are discussed in detail. Quasistatic method is used to deterndne the normal boiling poillts for dmerent concentrations of binary systems of ethanol-acetone, benzene-carbon tetrachloride and benzene-toluene.According to the data of boiling point, the differential heats and the entropies of vaPorization are calculated. The obtained results show that when the deviations of the binary solvent Anxture from the ideal solution are not notable the normal entropy of vaPorization of the solvent Anxture conforms to Trouton's rule.