Medium INTEGER +4 / -1 PYQ · JEE Mains 2020

The Gibbs change (in J) for the given reaction at
[Cu2+] = [Sn2+] = 1 M and 298K is :

Cu(s) + Sn2+(aq.) $\to$ Cu2+(aq.) + Sn(s);

($E_{S{n^{2 + }}|Sn}^0 = - 0.16\,V$,
$E_{C{u^{2 + }}|Cu}^0 = 0.34\,V$)
Take F = 96500 C mol–1)

Answer (integer) 96500

Solution

$\Delta$G = $\Delta$G<sup>o</sup> + RTln $\left[ {{{S{n^{ + 2}}} \over {C{u^{ + 2}}}}} \right]$ <br><br>= –2 × 96500 [(–0.16) – 0.34] + RT$\left[ {{1 \over 1}} \right]$ <br><br>= 96500 J

About this question

Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells

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