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(C) According to Le Chatelier's principle,an increase in temperature favors the endothermic reaction (where $\Delta H > 0$).$1$. The reaction $CO_{(g)

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$H_2O_{(g)} \rightleftharpoons H_{2(g)} + \frac{1}{2}O_{2(g)}$ (Endothermic)

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(C) According to Le Chatelier's principle,an increase in temperature favors the endothermic reaction (where $\Delta H > 0$).$1$. The reaction $CO_{(g)} + H_2O_{(g)} \rightleftharpoons CO_{2(g)} + H_{2(g)}$ is exothermic.$2$. The reaction $2SO_{2(g)} + O_{2(g)} \rightleftharpoons 2SO_{3(g)}$ is exothermic.$3$. The reaction $H_2O_{(g)} \rightleftharpoons H_{2(g)} + \frac{1}{2}O_{2(g)}$ is endothermic $(\Delta H > 0)$.$4$. The reaction $4HCl_{(g)} + O_{2(g)} \rightleftharpoons 2H_2O_{(g)} + 2Cl_{2(g)}$ is exothermic.Therefore,increasing the temperature will shift the equilibrium in the forward direction for the endothermic reaction,which is option $C$.

If the temperature is increased,which of the following reactions will proceed in the forward direction?

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