Chapter 15, Problem 15.96QP

(a)

Interpretation Introduction

Interpretation:

The way by which the nickel and its solid impurities can be separated has to be given.

Concept Introduction

Mond process:

• Ludwig Mond developed this process for extracting and purifying nickel.
• It involves the conversion of nickel oxides to pure nickel metal.
• By a series of treatments like concentration, roasting of minerals, the oxide is obtained from the nickel ore.

(b)

Interpretation Introduction

Interpretation:

The recovery of nickel has to be explained.

Concept Introduction

The value of standard enthalpy change ${\text{ΔH}}^{\text{ο}}$ of the given reaction is calculated by the formula,

  ${\text{ΔH}}^{\text{ο}}\text{=}{{\displaystyle \sum {\text{n}}_{\text{p}}{\text{ΔH}}_{\text{f}}^{\text{ο}}}}_{\left(\text{products}\right)}-{{\displaystyle \sum {\text{n}}_{\text{r}}{\text{ΔH}}_{\text{f}}^{\text{ο}}}}_{\left(\text{reactants}\right)}$

Where,

  $\begin{array}{c}{\text{ΔH}}_{\text{f}}^{\text{ο}}{}_{\left(\text{reactants}\right)}\text{=}\text{the standard enthalpy of formation for the reactants}\\ {\text{ΔH}}_{\text{f}}^{\text{ο}}{}_{\left(\text{products}\right)}\text{=}\text{the standard enthalpy of formation for the products}\\ {\text{n}}_{\text{p}}\text{=}\text{number of products molecule}\\ {\text{n}}_{\text{r}}\text{=}\text{number of reactants molecule}\end{array}$