   Chapter 14, Problem 4PS

Chapter
Section
Textbook Problem

In the synthesis of ammonia, if –Δ[H2]/Δt = 4.5 × 10−4 mol/L · min, what is Δ[NH3]/Δt?N2(g) + 3 H2(g) → 2 NH3(g)

Interpretation Introduction

Interpretation: The rate of formation of NH3 has to be given.

Concept introduction:

Relative rates and stoichiometry: During a chemical reaction, amounts of reactant decrease with time and amounts of products increases.

Reaction Rate = - 1coefficientΔ[reactants]Δt = +1coefficient Δ[products]Δt

Explanation

The rate of formation of NH3 is given as,

Reaction Rate = - 1coefficientΔ[reactants]Δt = +1coefficient Δ[products]ΔtGivenreaction: N2(g) + 3H2(g)2NH3(g)Reactant: N2(g) + 3H2(g)Product: 2NH3(g) The red colored numbers represent the stoichiometry coefficients.Reaction Rate = - 11Δ[N2]Δt = - 13Δ[H2]Δ

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