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【简答题】
为了将含非挥发性杂质的甲苯提纯,在86.0 kPa压力下用水蒸气蒸馏。已知:在此压力下该系统的共沸点为80°C,80°C的饱和蒸气压为47.3 kPa。试求: (1)气相的组成(含甲苯的摩尔分数); (2)欲蒸出100 kg纯甲苯,需要消耗水蒸气多少千克?
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