Question

Two liquids drops coalesce to form a large drop. Now,(a) energy is liberated(b) energy is neither liberated nor absorbed(c) some mass gets converted into energy(d) energy is absorbed

Answer 1

Coalescence reduces surface area so the large drop will have less surface energy than the two drops so energy is evolved

E1 +E2 = E(large drop) + energy

And the temperature of the large drop will rise.