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  • (a) Calculate  for the reaction <img alt="Zn (s) + Cu_{2}+ (aq) \rightarrow Zn^{2+} (aq) + Cu (s)." src="https://learn.careers360.com/latex-

(a) Calculate \Delta G^{\circ} for the reaction Zn (s) + Cu_{2}+ (aq) \rightarrow Zn^{2+} (aq) + Cu (s).

Given : E^{\circ} for Zn^{2+}/Zn = - 076 V and

E^{\circ} for Cu^{2+}/Cu = + 0.34 V

R = 8314 JK^{-1} mol^{-1}

F = 96500 C mol^{-1}.

(b) Give two advantages of fuel cells.

 

 
 
 
 
 

Answers (1)

(a) Eo cell = EoC – EoA = 0.34 – (- 0.76) = 1.10V

Hence, \Delta G^{\circ} = -nFE^{\circ} = -2 * 1.10 * 96500 = -212300 J/mol or -212.3 kJ/mol

(b) Two advantages of fuel cells are-

(i) Pollution free (ii) High efficiency

 

Posted by

Safeer PP

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