JEE Advanced2017ChemistryThermodynamics (C)Actual
For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant K in terms of change in entropy is described by:
Options
- Awith increase in temperature, the value of K for exothermic reaction decreases because the entropy change of t
- Bwith increase in temperature, the value of K for endothermic reaction increases because unfavourable change in
- Cwith increase in temperature, the value of K for exothermic reaction decreases because favourable change in en
- Dwith increase in temperature, the value of K for endothermic reaction increases because the entropy change of
Correct answer
B. with increase in temperature, the value of K for endothermic reaction increases because unfavourable change in
Step-by-step solution
ΔS surrounding = - q process T surrounding If ΔH > 0 , on increasing temperature, K equilibrium also increase, so ΔS surrounding < 0 (Surrounding is unfavourable). If ΔH < 0 , on increasing temperature K equilibrium , decreases, so ΔS surrounding > 0 (Surrounding is favourable).