Question
Chemistry Question on Chemical Kinetics
The tendency of a reaction to take place spontaneously is greatest when the reaction is:
A
(A) Exothermic and randomness increases
B
(B) Endothermic & randomness increases
C
(C) Exothermic and randomness decreases
D
(D) Endothermic & randomness decreases
Answer
(A) Exothermic and randomness increases
Explanation
Solution
Explanation:
For exothermic reaction ΔH= negative and if randomness increases it means ΔS becomes positive. Thus, according to ΔG=ΔH−TΔS,ΔG becomes negative so, the reaction is spontaneous.Hence, the correct option is (A).