Question

(a) For the reaction 

2AgCl (s) + H₂(g) (1 atm) →  2Ag(s) + 2H⁺ (0.1 M) + 2Cl^-(0.1 M), 

△Gº = - 43600 J at 25ºC. 

Calculate the e.m.f. of the cell. 

[log 10^-n = -n] 

(b) Define fuel cell and write its two advantages

Answer 1

(b) Fuel cells are galvanic cell designed to convert the energy from the combustion of fuel directly into electrical energy. 

Its two advantages are : 

(i) Fuel cells are free from pollution. 

(ii) Fuel cells are highly efficient.