COMEDK2015ChemistryElectrochemistry
The standard electrode potential for Daniell cell is 1.1 ~V . What is the standard Gibbs energy for the reaction?
Options
- A212.3 ~kJ ~mol ⁻¹
- B-2123 ~kJ ~mol ⁻¹
- C106.15 ~kJ ~mol ⁻¹
- D-106.15 ~kJ ~mol ⁻¹
Correct answer
B. -2123 ~kJ ~mol ⁻¹
Step-by-step solution
Net reaction occuring in a Daniell cell is aligned Zn (s) &+ Cu ²⁺(a q) Zn ²⁺(a q)+ Cu (s) G &=-n F E^ =-2 96500 1.1 &=-212300 ~J ~mol ⁻¹=-212.3 ~kJ ~mol ⁻¹ aligned