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Chemistry · Unit 3 · Chemical equilibrium systems · Chemical equilibrium

Determine the extent of a reaction from the magnitude of the equilibrium constant (Kc).

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Question 1

For the equilibrium reaction $$\text{N}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g)$$ at 2000 K, the equilibrium constant is $K_c = 4.1 \times 10^{-31}$. Determine the statement that best describes the extent of this reaction.

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Question 2

At 25 °C, the reaction $\mathrm{N_2O_4(g) \rightleftharpoons 2NO_2(g)}$ has an equilibrium constant $K_c = 4.6 \times 10^{-3}$. Determine which statement is correct about the position of equilibrium.

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Question 3

At 298 K, the equilibrium constant $(K_c)$ for the reaction between nitrogen and oxygen is $3 \times 10^{-30}$. Determine whether the concentration of the reactants or products is greater at equilibrium at this temperature.

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