The standard Gibbs energy for the given cell reaction in k J   m o l - 1 at 298   K is: Z n s + C…

The standard Gibbs energy for the given cell reaction in kJ mol-1 at 298 K is:
Zns+Cu2+aqZn2+aq+Cu(s) ,
E0=2 V at 298 K
(Faraday's constant ,F=96000 C mol-1)
  1. -192
  2. 192
  3. 384
  4. -384

Solution

For the reaction,
Cu2+aq+ZnsZn2+aq+Cus
n=2, two electrons are exchanged
Go=-nFEo
=-2×96000×2=-384000
=-384 kJ

Asked in: JEE Main 2019 (09 Apr Shift 1)

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