Reaction Quotient and Equilibrium Shift

Question

For the reaction $$2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$$, the equilibrium constant is $$K_c = 100$$. A reaction vessel is prepared with initial concentrations of $$[SO_2] = 0.5\,M$$, $$[O_2] = 0.2\,M$$, and $$[SO_3] = 0.1\,M$$. Which statement correctly describes the system as it approaches equilibrium?

Accepted Answer

The reaction will shift right towards more SO₃.

Answer

No shift occurs because Q is nearly equal to K.

Answer

The reaction will shift left towards more SO₂ and O₂.

Answer

The system is already at equilibrium.

Reaction Quotient and Equilibrium Shift

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