The equilibrium constant Kp in the chemical equation H2 (g) + I2 (g) ⇌ 2HI (g) is determined by:
Correct answer: D. Temperature
- A. Total pressure
- B. Catalyst utilized
- C. Amount of H2 and I2
- D. Temperature
Explanation
The equilibrium constant is a characteristic property of a specific chemical reaction. For the reaction between hydrogen and iodine, KP is a mathematical constant that only changes if the temperature of the system is modified. Factors like pressure, volume, or the addition of a catalyst do not change this value because they do not alter the energy levels or the nature of the chemical species involved.
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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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