Section-D: Comprehension Type
The E° values for the changes given below are measured against NHE at 27°C.
Cu2+ + e →Cu+, E° = +0.15 V;
Cu+ + e →Cu, E° = +0.50 V;
Zn2+ + 2e →Zn, E° = –0.76
The temperature coefficient of emf a cell designed as is –1.4 × 10–4 V per degree. For a cell reaction in equilibrium ΔG = 01 and ΔG° = –2.303 RT log10 Kc. The heat of reaction and entropy change during the reaction are related by ΔG = ΔH – TΔS.
The E° of Zn | Zn2+ || Cu2+ | Cu cell is :