Answer to Question #252262 in Physical Chemistry for uly

Question

⦁ Which of these 2 reactions occur with the greater increase in entropy? Explain your reasoning.

Reaction 1: 2NO(g) → N2(g) + O2(g)

Reaction 2: Br2(g) + Cl2(g) → BrCl(g)

Answer 1

Reaction 1: 2NO(g) → N2(g) + O2(g)

In an exothermic reaction, the external entropy (entropy of the surroundings) increases. In an endothermic reaction, the external entropy (entropy of the surroundings) decreases.