JEE Main · ChemistryHard
For a reaction at equilibrium, the temperature dependence of the equilibrium constant is given by the van't Hoff equation . If the enthalpy of reaction is constant and positive, what happens to as temperature increases?
- A. increases
- B. decreases
- C. remains constant
- D. first increases then decreases
Show correct answer & step-by-step solution
Correct answer: A — increases
Solution
- The van't Hoff equation is .
- Given , the derivative is positive.
- A positive derivative implies that increases as increases.
- Therefore, increases as increases.
- Hence the answer is (A).
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