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向水中加鹽後,氯化鈉(食鹽)分子分解成鈉離子和氯離子,並與水分子相結合.此時水分子如果要變成水蒸氣,就需要在脫離其他水分子吸引的同時擺脫鈉離子和氯離子的束縛,需要更多的能量,所以鹽水的沸點比水高.
不能, 只要到了沸點,水吸收的熱量就不用來升溫 而用來减弱分子間的束縛,就是汽化
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