4.已知苯(A)和甲苯(B)的饱和蒸气压计算公式分别如下式-|||-lg (dfrac (pA)({p)_(a)})=9.7795-dfrac (1686.8K)(T)-|||-lg (dfrac (poverrightarrow {B)}({P)_(a)})=10.4549-dfrac (2047.3K)(T)-|||-若苯和甲苯可形成理想液态混合物,试计算:370K下饱和蒸气压等于100kPa的苯-甲苯-|||-系统的液态组成x B和气态组成yB。

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