Question

Which is/are exothermic process
(i) Decomposition of FeSO₄
(ii) Dilution of H₂SO₄
(iii) Dissolution of sodium hydroxide

Answer 1

Dear student,

(1) the decomposition of iron sulphate is an endothermic process.
(2) dilution of sulphuric acid is an exothermic process
(3) dissolution of sodium hydroxide is also an exothermic process.
as when we do the above activities then the vessel in which we perform these activities will become hot in 2nd and 3rd while in 1st activity the vessel becomes cold. Because heat is absorbed in 1st while in 2nd and 3rd heat is released.
Regards