Choose the answer that most correctly explains why changing the temperature causes a shift in equilibrium? Changing temperature cannot affect the equilibrium of a reaction. Changing temperature will have an unequal effect on the rates of the forward and reverse reactions based on their frequency factors. Changing temperature will always have a greater effect on the forward reaction rate than on the reverse reaction rate. Changing temperature will have an unequal effect on the rates of the forward and reverse reactions based on their activation energies.

Lowering or increasing the temperature of the reaction will cause it to either be an endothermic or exothermic reaction, which are the names for reactions where heat is absorbed (former) and reactions where heat is released (latter) with the products. This shift in temperature will also change the value of the equilibrium constant.

This change in constant value is what causes the unequal effect on the rates of the forward and reverse reactions.

bhoopendrasisodiya34 bhoopendrasisodiya34 · Answer 2 · 2022-02-23T17:40:37+01:00

Frequency factor is responsible for unequal effect on the forward and reverse reactions rate by changing the temperature. Option B is correct.

What is effect of temperature on equilibrium of a reaction?

The temperature of a process effects the equilibrium of a reaction in the following manner.

When the temperature of the process is increased, then the position shift in the direction of the endothermic reaction(absorbs the heat and cools the surrounding) .
When the temperature of the process is decreased, then the position shift in the direction of the exothermic reaction (release the heat and warm the surrounding) .

Lets check all the option one by one-

Changing temperature cannot affect the equilibrium of a reaction- As the change in the temperature shift the direction of the equilibrium of a reaction. Thus this option is not correct.

Changing temperature will have an unequal effect on the rates of the forward and reverse reactions based on their frequency factors- As the change in temperature shift the direction of equilibrium in either endothermic reaction or exothermic reaction. This change is constant and due to the molecular collision of equilibrium of reaction. Therefore we get the unequal effect based on frequency factors.

Changing temperature will always have a greater effect on the forward reaction rate than on the reverse reaction rate- If activation energy of forward direction is higher, then only changing temperature will have a greater effect on the forward reaction rate otherwise the reverse reaction rate.

Changing temperature will have an unequal effect on the rates of the forward and reverse reactions based on their activation energies- No, changing temperature will have an unequal effect on the rates of the forward and reverse reactions based on frequency factor.

The frequency factor is responsible for unequal effect on the forward and reverse reactions rate by changing the temperature. Option B is correct.'

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