With increase in temperature generally the value of the equilibrium constant of endothermic reversible reaction

Options

A. Increases
B. decreases
C. Change can not be predicated
D. Does not change

Answer

To solve the question regarding the effect of temperature on the equilibrium constant of an endothermic reversible reaction, we can follow these steps:

### Step 1: Understand the nature of the reaction
An endothermic reaction is one that absorbs heat. For a general endothermic reaction:
\[ A + B + \text{heat} \rightleftharpoons C + D \]

### Step 2: Identify the effect of temperature on equilibrium
According to Le Chatelier's principle, if we increase the temperature of an endothermic reaction, the system will shift in the direction that absorbs heat to counteract the change. In this case, it favors the forward reaction (the formation of products C and D).

### Step 3: Analyze the equilibrium constant expression
The equilibrium constant \( K_c \) for the reaction can be expressed as:
\[ K_c = \frac{[C][D]}{[A][B]} \]
Where \([C]\) and \([D]\) are the concentrations of the products, and \([A]\) and \([B]\) are the concentrations of the reactants.

### Step 4: Determine the effect of increased temperature on \( K_c \)
Since the forward reaction is favored with an increase in temperature, the concentrations of products \([C]\) and \([D]\) will increase, while the concentrations of reactants \([A]\) and \([B]\) will decrease. As a result, the value of \( K_c \) will increase.

### Step 5: Conclusion
Therefore, with an increase in temperature, the value of the equilibrium constant for an endothermic reversible reaction increases.

### Final Answer
The value of the equilibrium constant of an endothermic reversible reaction generally **increases** with an increase in temperature.

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