Examine the scenario.
Aarav is studying a reversible reaction at chemical equilibrium in which the forward reaction is an exothermic reaction and the reverse reaction is an endothermic reaction. After making his initial observations, Aarav cools the reaction, which removes thermal energy.
Based on his knowledge of Le Châtelier's principle, what can Aarav predict will occur?
A)The system will try to balance the change by shifting toward the endothermic reaction, and the rate of the forward reaction will increase.
B)The system will try to balance the change by shifting toward the exothermic reaction, and the rate of the reverse reaction will increase.
C)The system will try to balance the change by shifting toward the endothermic reaction, and the rate of the reverse reaction will increase.
D)The system will try to balance the change by shifting toward the exothermic reaction, and the rate of the forward reaction will increase.
Answers
Answer: D)The system will try to balance the change by shifting toward the exothermic reaction, and the rate of the forward reaction will increase.
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.
This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
For the given reaction:
Forward reaction is a exothermic reaction , thus heat is released into the surroundings and backward reaction is endothermic reaction, thus heat is absorbed from the surroundings.
On cooling the reaction , which removes thermal energy.
Thus temperature is deceased, so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where increase in temperature occurs. As, forward reaction releases heat , thus reaction will shift in the right direction or rate of forward reaction will increase.