For the given cell; Cu(s)|Cu2+ (C1M)||Cu2+(C2M)|Cu(s) change in Gibbs energy (G) is negative, if: (A — JEE Mains Chemistry Past Papers Chemistry Question
Question
For the given cell; Cu(s)|Cu2+ (C1M)||Cu2+(C2M)|Cu(s) change in Gibbs energy (G) is negative, if: (A) C2 = C1 (B) C2 = 2 C1 (C) C1 = C2 (D) C1 = 2 C2
Answer: B
💡 Solution & Explanation
For concentration cell Eºcell = 0 Anode : Cu(s) Cu2+(aq)A Cathode : Cu2+(aq)C Cu(s) ___________________ Overall : Cu2+(aq)C Cu2+(aq)A As G = –nF Ecell | JEE MAIN-2020 | DATE : 06-09-2020 (SHIFT-2) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 7 If G = –ve then Ecell is positive. Ecell = Eºcell – 059 .0 log C C1 Ecell = 059 . log C C1 Ecell > 0 C2 > C1
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