A、B兩液體混合成理想溶液，50度時，A、B兩純液體的飽和蒸氣壓依序為300mmHg及100mmHg。今於50度時，某A、B混合所成之理想溶液，液面上之蒸氣組成中A的莫耳分率＝0.5，則此溶液之蒸氣壓為？ mmHg (A)120 (B)150 (C)200 (D)240 mmHg?
回答 (1)
2015-12-01 9:54 am
在蒸氣中：
A的蒸氣壓 = p°(A) × X(A) = (300 mmHg) × 0.5 = 150 mmHg
B的蒸氣壓 = p°(B) × X(B) = (100 mmHg) × (1 - 0.5) = 50 mmHg
溶液之蒸氣壓 = (150 + 50) mmHg = 200 mmHg ...... 答案選(C)
A的蒸氣壓 = p°(A) × X(A) = (300 mmHg) × 0.5 = 150 mmHg
B的蒸氣壓 = p°(B) × X(B) = (100 mmHg) × (1 - 0.5) = 50 mmHg
溶液之蒸氣壓 = (150 + 50) mmHg = 200 mmHg ...... 答案選(C)
收錄日期: 2021-04-18 14:05:41
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