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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決 
固體氯化銨溶於水中會使水溫降低,此一過程為?
Aug 4th 2013, 03:40

答案是: (2) ΔH > 0, ΔS > 0

當氯化銨溶於水時,水溫降低,顯示溶解過程中吸收了水的能量。由此可知,氯化銨溶於水是吸熱過程,ΔH 大於 0

當氯化銨溶於水時,固體中排列整齊的氯離子和銨離子,變成了可在水中自由移動的離子。明顯地,過程中亂度增加,ΔS 大於0

參考資料 sioieng

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