TS EAMCET · Chemistry · Electrochemistry
What is the approximate standard free energy change per mole of \(\mathrm{Zn}\) (in \(\mathrm{kJ} \mathrm{mol}^{-1}\) ) for a Daniel cell at \(298 \mathrm{~K}\) ?
- A -212.3
- B 230
- C 0
- D -1.1
Answer & Solution
Correct Answer
(A) -212.3
Step-by-step Solution
Detailed explanation
For Daniell cell we have \[ \mathrm{Zn}(s)+\mathrm{Cu}^{2+}(a q) \longrightarrow \mathrm{Zn}^{2+}(a q)+\mathrm{Cu}(s) \] Gibbs free energy \(=-n F E\) \(n=\) number of electrons \(=2\) \(F=\) Faraday's constant \(=96500 \mathrm{C}\) \(E=\operatorname{emf}\) of cell…
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