Question

A galvanic cell has a standard emf of 1.10 V at 298 K. If this cell runs for 25 minutes with a constant current of 0.25 A, what is the amount of energy produced in joules? (Assume the cell is operating under standard conditions.)

Answer 1

To calculate the amount of energy produced in the galvanic cell, we can use the formula:Energy  E  = Voltage  V   Charge  Q First, we need to find the charge  Q  that has passed through the cell. We can do this using the formula:Charge  Q  = Current  I   Time  t Given that the current  I  is 0.25 A and the time  t  is 25 minutes, we can convert the time to seconds:t = 25 minutes  60 seconds/minute = 1500 secondsNow, we can find the charge  Q :Q = 0.25 A  1500 s = 375 CoulombsNow that we have the charge, we can find the energy produced in the galvanic cell:Energy  E  = Voltage  V   Charge  Q E = 1.10 V  375 C = 412.5 JoulesTherefore, the amount of energy produced in the galvanic cell is 412.5 Joules.