Question:
Which of the following are exothermic processes ?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)
Solution:
(a).
(i) Reaction of quick lime with ; water and (ii) dilution of an acid are both exothermic processes. The other two processes (iii) and (iv) are of
endothermic nature.