Essential Chemistry for IGCSE - Chemical Reactions (Section 5 - No. 1)
Which of the following reactions is favored by an increase in pressure?
2H₂(g) + O₂(g) ⇌ 2H₂O(g)
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
H₂(g) + I₂(g) ⇌ 2HI(g)
CaCO₃(s) ⇌ CaO(s) + CO₂(g)
Explanation
The reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g) has 4 moles of gas on the reactant side and 2 moles on the product side, so increasing pressure favors the side with fewer gas moles.
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