Change in which of these conditions will change the K of an equilibrium given as a starting point?
Correct answer: A. Temperature
- A. Temperature
- B. Pressure
- C. Concentration of reactants
- D. Concentration of products
Explanation
The equilibrium constant (K) is solely dependent on temperature for a given reaction. Changes in pressure or concentrations of reactants and products affect the position of equilibrium but not the value of K. Temperature changes, however, alter the rate constants of the forward and reverse reactions in different ways, thus changing the value of K.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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