For N2 + 3H2 <=> 2NH3 (exothermic), what is the effect of increasing the pressure at constant temperature?
Answer and explanation
Correct answer: D. The equilibrium shifts right and Kc is unchanged
- Step 1: There are 4 moles of gas on the left and 2 on the right. Step 2. Higher pressure favours fewer moles of gas, so the position shifts right. Step 3. Kc only changes with temperature. Answer: The equilibrium shifts right and Kc is unchanged. Why not the others: the position shifts to the side with fewer moles; Kc does not depend on pressure.
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