Consider an electrochemical cell: A (s)|A n+ (aq, 2 m)|| B 2 n+1 (aq, 1 m)| B (s). The value of 
H° for the cell reaction is twice that of 
G° at 300 K. If the emf of the cell is zero, the 
(in JK - 1 mol -1 ) of the cell reaction per mole of B formed at 300 K is _ (Given: In (2) = 0.7,R = 8.3 J K -1 mol. H, S and G are enthalpy, entropy and Gibbs energy, respectively.)
Text Solution
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-11.60
A(s) | A +n (aq. 2 M) || B +2n (aq. 1 M) | B(s)
H° = 2 
G°E cell = 0
Cell Rx A 
A +n + ne - ] x 2
B +2n + 2 ne - 
B(s)
2 A(s) + B +2n (aq) 
2 A +n (aq) + B(s)
1M 2M
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