Question

What is the efficiency of an electrochemical cell with a standard potential of 1.5 V if it releases 3000 J of electrical energy during operation with a total of 3500 J of heat energy being released?

Answer 1

The efficiency of an electrochemical cell can be calculated using the formula:Efficiency =  Useful energy output / Total energy input   100In this case, the useful energy output is the electrical energy released  3000 J , and the total energy input is the sum of the electrical energy and the heat energy released  3000 J + 3500 J = 6500 J .Efficiency =  3000 J / 6500 J   100 = 0.4615  100 = 46.15%The efficiency of the electrochemical cell is 46.15%.