Question

The rate of disappearance of hydrogen \((\text{H}_2)\) from the reaction \[ \text{N}_2(g) + 3\text{H}_2(g) \rightarrow 2\text{NH}_3(g) \] is \(6\, \text{g L}^{-1}\text{s}^{-1}\). The rate of production of ammonia \((\text{NH}_3)\) in \(\text{g L}^{-1}\text{s}^{-1}\) is:

• A. 20
• B. 34
• C. 30
• D. 10

Hint:

For reactions, use stoichiometric coefficients to relate rates of reactants and products.

Answer 1

The Correct Option is B

Step 1: Stoichiometric proportion.
N₂ + 3 H₂ → 2 NH₃, so the rate of NH₃ production is 2/3 the rate of H₂ consumption.

Step 2: Using the supplied rate.
Rate of NH₃ = (2/3) × 51 ≈ 34 g L⁻¹ s⁻¹.

Step 3: Conclusion.
Hence, the rate is 34 g L⁻¹ s⁻¹.