固體氯化銨溶於水中會使水溫降低，此一過程為?:－new htc one開箱,htc手機評價,htc手機比較,htc手機遊戲,htc手機維修,htc手機價位,htc手機推薦,htc手機鈴聲,中華電信htc手機,htc手機截圖,亞太htc手機,

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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決

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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