Law Of Mass Action
For the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), the expression for equilibrium constant Kc is:
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About This Question
- Subject
- chemistry
- Chapter
- equilibrium
- Topic
- law of mass action
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
[NH₃]²/[N₂][H₂]³
According to the Law of Mass Action, for a reversible chemical reaction at a constant temperature, the equilibrium constant (Kc) is the ratio of the product of molar concentrations of the products to that of the reactants, with each concentration term raised to a power equal to its stoichiometric coefficient in the balanced equation. For the synthesis of ammonia: N2(g)+3H2(g)⇌2NH3(g) Kc=[N2]1[H2]3[NH3]2
- Square brackets [] denote molarity (mol/L).
This easy difficulty chemistry question is from the chapter equilibrium, covering the topic of law of mass action. It appeared in the 2025 exam.
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