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用凝固点降低法测量了在C_1—C_4醇类的各异构物分别存在下,苯和对二甲苯溶剂的活度系数γ_B.用Wiehe-Bagley(WB)模型对数据进行了处理,得到各醇的自缔合常数K_A及无限稀活度系数γ_A~∞.在同一溶剂中,K_A依下列顺序减小:甲醇>乙醇>正丙醇>正丁醇;正丙醇>异丙醇;正丁醇>异丁醇>叔丁醇≥仲丁醇.各醇在对二甲苯中的K_A均大于相应的在苯中的K_A.
The activity coefficients γB of benzene and p-xylene solvents in the presence of each isomer of C 1 -C 4 alcohols were measured by the freezing point reduction method. The data were processed using the Wiehe-Bagley (WB) model to give the individual alcohols Of self-association constant K_A and infinite dilute activity coefficient γ_A ~ ∞ in the same solvent, K_A decreases in the following order: methanol> ethanol> n-propanol> n-butanol; n-propanol> isopropanol; Alcohol> isobutanol> tert-butanol> sec-butanol.The K_A of each alcohol in p-xylene was higher than that of K_A in benzene.