In the reaction, H2 +I2 ⇌ 2HI, addition of an inert gas will___________________?
Correct answer: D. Not affect the equilibrium conditions
- A. Increase the partial pressure of H2
- B. Increase the partial pressure of I2
- C. Increase the total pressure and hence shift the equilibrium towards the right
- D. Not affect the equilibrium conditions
Explanation
For H + I e2 2HI, the change in gaseous moles is zero, so adding an inert gas cannot alter the equilibrium composition. At constant volume the reactive partial pressures remain unchanged, and at constant pressure all are diluted equally without affecting the equilibrium condition.
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