AP Chemistrymediummcq1 pt
A catalyst is added to a reaction at equilibrium. What changes?
A.The speed of reaching equilibrium
B.The value of K
C.The equilibrium concentrations
D.The enthalpy change
Explanation
Core Concept
The catalyst lowers Ea for both directions equally, so forward and reverse rates rise together. K and the equilibrium position stay exactly the same.
Correct Answer
AThe speed of reaching equilibrium
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