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Select the wrong relation (s)....

Select the wrong relation `(s)`.

A

`DeltaS=((delE)/(delT))_(P)xxnF`

B

`-DeltaS=((delE)/(delT))_(P)xxnF`

C

`((delE)/(delT))_(P)=((delDeltaS)/(delT))`

D

`((delE)/(delT))_(P)=(DeltaH+nEF)/(T)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Select the wrong relation(s)", we need to analyze each of the given relations based on thermodynamic principles and equations. Let's break down the relations step by step. ### Step 1: Analyze the First Relation **Relation 1:** \( \Delta S = \frac{\Delta E}{\Delta T} \cdot nF \) at constant pressure. - This relation suggests that the change in entropy (\( \Delta S \)) is proportional to the change in energy (\( \Delta E \)) divided by the change in temperature (\( \Delta T \)), multiplied by the number of moles (\( n \)) and Faraday's constant (\( F \)). - This relation is generally correct in the context of electrochemistry where \( \Delta S \) can be related to changes in energy. **Conclusion:** This relation appears to be correct. ### Step 2: Analyze the Second Relation **Relation 2:** \( -\Delta S = \frac{\Delta E}{\Delta P} \cdot nF \) at constant pressure. - This relation suggests that the negative change in entropy is equal to the change in energy divided by the change in pressure, multiplied by \( nF \). - However, the relationship between entropy and energy changes typically involves temperature, not pressure. This relation does not hold true in standard thermodynamic contexts. **Conclusion:** This relation is incorrect. ### Step 3: Analyze the Third Relation **Relation 3:** \( \frac{\Delta E}{\Delta T} \) at constant pressure = \( \frac{\Delta S}{\Delta T} \). - This relation implies a direct proportionality between the change in energy with respect to temperature and the change in entropy with respect to temperature. - This is not a standard relation in thermodynamics and does not hold true as stated. **Conclusion:** This relation is also incorrect. ### Step 4: Analyze the Fourth Relation **Relation 4:** \( \frac{\Delta E}{\Delta T} \) at constant pressure = \( \frac{\Delta H}{nF} \cdot \frac{1}{T} \). - This relation suggests that the change in energy with respect to temperature at constant pressure is related to the change in enthalpy (\( \Delta H \)) divided by \( nF \) and temperature. - This relation can be derived from the Gibbs free energy equation and is consistent with thermodynamic principles. **Conclusion:** This relation appears to be correct. ### Final Conclusion The wrong relations are: - Relation 2: \( -\Delta S = \frac{\Delta E}{\Delta P} \cdot nF \) at constant pressure. - Relation 3: \( \frac{\Delta E}{\Delta T} \) at constant pressure = \( \frac{\Delta S}{\Delta T} \).

To solve the question "Select the wrong relation(s)", we need to analyze each of the given relations based on thermodynamic principles and equations. Let's break down the relations step by step. ### Step 1: Analyze the First Relation **Relation 1:** \( \Delta S = \frac{\Delta E}{\Delta T} \cdot nF \) at constant pressure. - This relation suggests that the change in entropy (\( \Delta S \)) is proportional to the change in energy (\( \Delta E \)) divided by the change in temperature (\( \Delta T \)), multiplied by the number of moles (\( n \)) and Faraday's constant (\( F \)). - This relation is generally correct in the context of electrochemistry where \( \Delta S \) can be related to changes in energy. ...
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