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In the following question, A statement o...

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): At the equilibrium position in the process of adsorption AH = TAS.
Reason (R): Adsorption is accompanied by decrease in surface energy.

A

Both A and Rare true and R is the correct explanation of A

B

Both A and R are true but explanation of A

C

A is true but R is false

D

A is false and R is True

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the Assertion (A) and Reason (R) statements, we will analyze both statements step by step. ### Step 1: Analyze the Assertion (A) **Assertion (A):** At the equilibrium position in the process of adsorption, ΔH = TΔS. - **Explanation:** In thermodynamics, at equilibrium, the change in Gibbs free energy (ΔG) is zero. The relationship is given by the equation: \[ ΔG = ΔH - TΔS \] At equilibrium, since ΔG = 0, we can rearrange the equation: \[ ΔH = TΔS \] Therefore, the assertion is true. ### Step 2: Analyze the Reason (R) **Reason (R):** Adsorption is accompanied by a decrease in surface energy. - **Explanation:** When a substance adsorbs onto a surface, it typically results in the formation of new bonds between the adsorbate and the adsorbent. This process can lead to a decrease in surface energy because the formation of bonds releases energy (exothermic process). Thus, the statement about adsorption being accompanied by a decrease in surface energy is also true. ### Step 3: Determine the Relationship Between A and R - While both statements are true, we need to assess if the reason (R) correctly explains the assertion (A). The assertion relates to the thermodynamic relationship at equilibrium, while the reason discusses the energy changes associated with adsorption. - The decrease in surface energy (R) does not directly explain why ΔH equals TΔS at equilibrium (A). They are related concepts, but R does not serve as a direct explanation for A. ### Conclusion - **Final Answer:** Both A and R are true, but R is not the correct explanation of A. Therefore, the correct choice is option 2. ---
To solve the question regarding the Assertion (A) and Reason (R) statements, we will analyze both statements step by step. ### Step 1: Analyze the Assertion (A) **Assertion (A):** At the equilibrium position in the process of adsorption, ΔH = TΔS. - **Explanation:** In thermodynamics, at equilibrium, the change in Gibbs free energy (ΔG) is zero. The relationship is given by the equation: \[ ΔG = ΔH - TΔS ...
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