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【简答题】
某完全互溶的双液系在一定的外压下的 T-x图如下所示,体系中物质总量为1mol,物系点S处的组成为xB=0.5,D点xB=0.3,E点xB=0.7,问:(1)该二组分溶液是产生了较大的正偏差还是较大的负偏差?(2)S点和 DE之间的某点 所处相区 分别是几相共存?( 3)G点表示什么?(4)如果有xB=0.8的该双液系混合物,经精馏后最终可得到哪两种液体?(5)根据杠杆定理,C点的物质的量是多少?
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