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某理想混合溶液的A、B两个组分的饱和蒸气压公式如下：【图片】p的单位为mmHg，t的单位为℃常压下的体系的平均相对挥发度用两个物质沸点的平均温度下的挥发度计算。问相对挥发度是多少，y=0.8时的x等于多少。计算后判定下列选项哪些正确？A.
A的沸点约为80℃，B的沸点约为110℃
B.
平均沸点温度下A、B的饱和蒸气压分别为157.1和83.58kPa
C.
常压下的相对挥发度为2.47
D.
y=0.8时，x=0.5
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