Chapter 18, Problem 18.26P

Interpretation Introduction

Interpretation:

It has to be explained the observations in mechanistic terms for the given below reaction.

  $2N{H}_3\left(g\right)\stackrel{W\left(s\right)}{\to }{N}_2\left(g\right)+3H_2\left(g\right)$

Concept Introduction:

Rate law or rate equation: The relationship between the reactant concentrations and reaction rate is expressed by an equation.

  $\begin{array}{l}\text{aA + bB}\to x\text{X}\\ \\ {\text{Rate of reaction = k [A]}}^{\text{m}}{\text{[B]}}^{\text{n}}\\ \\ \text{Total}\text{order}\text{of reaction = }\left(\text{m + n}\right).\end{array}$

Order of a reaction: The order of a reaction with respect to a particular reactant is the exponent of its concentration term in the rate law expression, and the overall reaction order is the sum of the exponents on all concentration terms.

Rate constant, k: It is a proportionality constant that relates rate and concentration at a given temperature.