3. Inside a chemical battery it is not actually individual electrons that are tr

Question

3. Inside a chemical battery it is not actually individual electrons that are transported from the + end to the - end. At the+ end of the battery an "acceptor" molecule picks up an electron entering the battery, and at the - end a different "donor" molecule gives up an electron, which leaves the battery. lons rather than electrons move between the two ends to transport the charge inside the battery. When the supplies of acceptor and donor molecules are used up in a chemical battery, the battery is dead, because it can no longer accept or release electrons. The electron current in electrons per second, times the number of seconds of battery life, is equal to the number of donor (or e acceptor) molecules in the battery A flashlight battery contains approximately half a mole of donor molecules. The electron current through a thick-filament bulb powered by two flashlight batteries is about 0.3 A. About how many hours will the batteries keep this bulb lit?

Explanation / Answer

Number of donor molecules in two batteries = 1 mole
= Avogadro's number
= 6.023 x 1023
= 6.023 x 1023

Current x time = Total number of donor molecules
0.3 x t = 6.023 x 1023
t = (6.023 x 1023) / 0.3
= (20.077 x 1023) s
= (20.077 x 1023) / 3600 Hrs
= 5.577 x 1020 Hrs

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.