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Question from: Chemistry

\(\ce{N2O4(g) <=> 2 NO2(g)}\) \(\Delta H = +ve\). In the reaction above, an increase in temperature will

A)  

increase the value of the equilibrium constant

B)  

shift the equilibrium to the left

C)  

decrease the value of the equilibrium constant

D)  

increase the proportion of reactants

Solutions

j

juanbacan

hace 18 días

Solution

0

Explanation: The forward reaction \(\ce{N2O4(g) <=> 2 NO2(g)}\) is endothermic (\(\Delta H > 0\)). Raising the temperature adds “heat,” which—by Le Châtelier’s principle—favours the endothermic (forward) direction, producing more \(\ce{NO2}\). For endothermic reactions, increasing temperature increases the equilibrium constant \(K\) (van ’t Hoff relation), because the products are favored.

  • Shift to the left / increase reactants → incorrect (it shifts to the right).
  • Decrease \(K\) → incorrect (endothermic: \(K\) increases with \(T\)).

Correct option: increase the value of the equilibrium constant.

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