Choose the correct option? (A) Electrochemical reactions reverse the action of electrolysis. Whereas electrolysis converts electrical energy to chemical energy, electrochemical reactions convert chemi

Question

Choose the correct option?
(A) Electrochemical reactions reverse the action of electrolysis. Whereas electrolysis converts electrical energy to chemical energy, electrochemical reactions convert chemical energy directly to electrical energy.
(B) There is a convenient difference between electrochemical reactions and chemical reactions: the Gibbs energy change for an electrochemical reaction is equivalent to the maximum electrical work done by system on surrounding.
(C) The purpose of the salt bridge is to complete the electrical circuit between the two solutions and to facilitate the movement of ions from one compartment to the other.
(D) An equation relating the emf of a cell to variables such as temperature and the concentrations of reacting species is known as Nernst equation.

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. Process BC : C B B B B C P P P 1 P 2bar T T 500 250      and   1 BC V m C B U n.C T T    =   2 1.5R 250 500    = –750 R Process CD : U w     1 V m D C n.C T T     ext D C P V V   or,   D C n 1.5R T T    C D D D C nRT nRT P P P         D T 450K   and   1 CD P m D C H n.C . T T      2

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