Chapter 21, Problem 21.110CHP

Interpretation Introduction

Interpretation:

The temperature at which the Mond reaction for the formation of $Ni{(CO)}_4$ becomes nonspontaneous has to be estimated.

Concept introduction:

• For a nonspontaneous reaction $\Delta Hand\Delta S$ is negative so, $\Delta G$ is negative at higher temperature.
• Entropy change $\Delta S=\frac{Heatenergytransferred}{Temperature}=\frac{\Delta H}{T}$
• Mond process is a method in which volatile compound nickel tetracarbonyl $Ni{(CO)}_4$ is formed and subsequently decomposed.

$Ni(s)+4CO(g)\rightleftharpoons Ni{(CO)}_4(g)$, where $\Delta H^o=-160.8kJ\Delta S^o=-410J/K$