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Which among the following changes are ex...

Which among the following changes are exothermic or endothermic in nature?
(a) Decomposition of ferrous sulphate
(b) Dilution of sulphuric acid
`(c)`Dissolution of sodium hydroxide in water
(d) Dissolution of ammonium chloride in water

Text Solution

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(a) Decomposition of ferrous sulphate is an endothermic reaction because heat is absorbed during the reaction.
(b) The process of dissolving sulphuric acid in water (i.e., dilution of sulphuric acid ) is a highly exothermic reaction.
`(c)`The process of dissolving sodium hydroxide (a bare) in water is again a highly exothermic reaction.
(d) Dissolution of ammonium chloride in water is an endothermic reaction as heat is absorbed during the reaction.
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