AP EAMCET2015ChemistryElectrochemistry
Calculate G^ for the following cell reaction. aligned & Zn ( s )+ Ag ₂ O ( s )+ H ₂ O (l) & Zn ²⁺( aq )+2 Ag ( s )+2⁻ OH ( aq ) & E_ Ag ⁺ / Ag ^ =+0.80 ~V and E_ Zn ²⁺ / Zn ^ =-0.76 ~V aligned
Options
- A-305 ~kJ / mol
- B-301 ~kJ / mol
- C305 ~kJ / mol
- D301 ~kJ / mol
Correct answer
B. -301 ~kJ / mol
Step-by-step solution
E_ cell ^ =E^ _C-E_A^ =0.80-(-0.76)=1.56 ~V From the equation G^ =-n F E^ aligned & =-2 96500 1.56(n=2) & =-301080 ~J / mol & =-301 ~kJ / mol aligned