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Consider the following reaction at equilibrium:

\[ \text{Fe}_3\text{O}_4(s) + \text{CO}(g) \leftrightarrow 3 \text{FeO}(s) + \text{CO}_2(g) \quad \Delta H^\circ = +35.9 \, \text{kJ} \]

What effect will increasing the temperature have on the system?

A. The equilibrium constant will decrease.
B. No effect will be observed.
C. The reaction will shift to the right in the direction of products.
D. The equilibrium constant will increase.
E. The reaction will shift to the left in the direction of reactants.

Answer :

The reaction will move to the left in the direction of the reactants as the temperature rises, favouring the endothermic path. The reaction will move left in the direction of the reactants, thus that is the right response.

A chemical process that takes heat from its surroundings is said to be going in an endothermic direction. Because the reactants and products of an endothermic reaction have different energies, heat energy is needed to help the reaction proceed and create the products. An endothermic reaction is one that absorbs heat while it is occurring. This can be felt as a drop in temperature in the immediate environment or shown by thermodynamic calculations. An endothermic process has a positive enthalpy change (H), which means energy is being absorbed. The reaction will move to the left in the direction of the reactants as the temperature rises, favouring the endothermic path. The reaction will move left in the direction of the reactants, thus that is the right response.

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Answer:

The reaction will shift to the right in the direction of products.

Explanation:

According to Le Chatelier's Principle, the change in any state of the equilibrium say temperature, volume, pressure, or the concentration, the equilibrium will oppose these changes and will shift in such a way that the effect cause must be nullified.

For an endothermic reaction,

On increasing the temperature, reaction will go in forward direction (towards right), because according to Le Chatelier's principle as we increase the temperature, the equilibrium is will be disturbed , so to again establish the equilibrium, the reaction will go in forward direction as it is endothermic in nature (towards right).

Thus, the [tex]\Delta H^0[/tex] of the given reaction is positive and thus, on increasing temperature, reaction will go in forward direction.

Answer:- The reaction will shift to the right in the direction of products.

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