Question

TYPED RESPONSE ONLY WITH AT LEAST 1 REFERENCE:

Define Homogeneous equilibrium and heterogeneous equilibrium. Give two examples of each.

Answer 1

An equilibrium in which all the reactants and products are in the same phase is called homogeneous equilibrium.

eg.1. Reacion between nitrogen and hydrogen in a closed vessel

N_{2 (g)} + 3H_{2 (g)}   2NH_{3 (g) ;} All the   reactants and products are in homogeneous gaseous phase.

eg 2.

Fe³⁺_(aq) +SCN^-_(aq) Fe(SCN)²⁺ _(aq)   ;All the reactants and products are in homogeneous solution phase.

Equilibrium in a system having more than one phase is called heterogeneous equlibrium

eg. 1. H₂O _(l) H₂O_{(g) ;} In equilibrium between liquid water and water vapour in a closed container, there is a liquid phase and a gas phase.

eg 2. Thermal dissociation of CaCO_3(s)

CaCO_3(s) CaO_(s)  + CO_{2 (g)} ; This system contains solid and gaseous phase.