The dissolution of ammonium chloride in water is an exothermic process but still it dissolves in water readily.why?

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Solution

Dear Student,

The driving force for dissolution is entropy which favours the bond-breaking and its reaction scheme is expressed below,

$N H_{4} C l (s) + H_{2} O (l) \overset{∆}{\to} N {H_{4}}^{+} + C l^{-} ∆ G = ∆ H - T ∆ S$

The exothermic state increases entropy of the system hence the dissolution happens in water.

Regards.

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Which of the following reactions are exothermic in nature?

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(b) Dilution of sulphuric acid

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The dissolution of ammonium chloride in water is an exothermic process but still it dissolves in water readily.why?

Dear Student, The driving force for dissolution is entropy which favours the bond-breaking and its reaction scheme is expressed below, NH4Cl(s)+H2O(l)→∆NH4++Cl-∆G=∆H-T∆S The exothermic state increases entropy of the system hence the dissolution happens in water. Regards.