1. Tardigrade
  2. Question
  3. Chemistry
  4. Consider the following statement about the equilibrium, 2 SO 2(g)+ O 2(g) leftharpoons 2 SO 3(g) ; Δ H°=-198 kJ I. On decreasing the temperature as well as pressure equilibrium shifts in forward direction. II. On increasing temperature and pressure equilibrium shifts in forward direction. III. On decreasing the temperature and increasing the pressure, equilibrium will shift in forward direction. Choose the correct statement.

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Q. Consider the following statement about the equilibrium,
$2 SO _{2}(g)+ O _{2}(g) \rightleftharpoons 2 SO _{3}(g) ; \Delta H^{\circ}=-198\, kJ$
I. On decreasing the temperature as well as pressure equilibrium shifts in forward direction.
II. On increasing temperature and pressure equilibrium shifts in forward direction.
III. On decreasing the temperature and increasing the pressure, equilibrium will shift in forward direction.
Choose the correct statement.

Equilibrium

Solution:

For the given reaction,
$2 SO _{2}(g)+ O _{2}(g) \rightleftharpoons 2 SO _{3}(g) \text {; }$
the value of $\Delta n$ and $\Delta H=-$ ve. Therefore, according to the Le-Chatelier's principle, the increase in pressure and decrease in temperature, shifts the equilibrium in forward direction.
Thus, option (c) is correct.