KVPY2013ChemistryElectrochemistry
The standard electrode potential of Zn ²⁺ / Zn is -0.76 ~V and that of Ca ²⁺ / Cu is 0.34 ~V . The emf ( V ) and the free energy change ( kJ mol ⁻¹ ) , respectively, for a Daniel cell will be
Options
- A-0.42 and 81
- B1.1 and -213
- C-1.1 and 213
- D0.42 and -81
Correct answer
B. 1.1 and -213
Step-by-step solution
E _ Cell ⁰= E ⁰ Cu ²⁺ | Cu + E ⁰ Zn | Zn ²⁺ E _ cell ⁰=0.34+0.76=+1.1 ~V G=-2 96500 1.1=-213 V