Chemical Thermodynamics Question 469
Question: The tendency of a reaction to take place spontaneously is greatest when the reaction is
Options:
A) Exothermic and randomness increases
B) Endothermic & randomness increases
C) Exothermic and randomness decreases
D) Endothermic & randomness decreases
Show Answer
Answer:
Correct Answer: A
Solution:
- For exothermic reaction $ \Delta H=-ve $ and if randomness increases it means $ \Delta S $ becomes positive. Thus according to $ \Delta G=\Delta H-T\Delta S;,\Delta G $ becomes $ -ve, $ so the reaction is spontaneous.
