Fuel cells have been developed that can generate a large amount of energy. For example, a hydrogen fuel cell works by combining hydrogen and oxygen gas to produce water and electrical energy. If a fuel cell can generate 10.0 kilowatts of power and the current is 15.8 amps, what is the voltage of the electricity?

Question

Camron Carey

Chemistry

7 April, 19:39

Fuel cells have been developed that can generate a large amount of energy. For example, a hydrogen fuel cell works by combining hydrogen and oxygen gas to produce water and electrical energy. If a fuel cell can generate 10.0 kilowatts of power and the current is 15.8 amps, what is the voltage of the electricity?

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Poppy · Answer 1

Use the equation P=VI.

P=power (in this case 10 kilowatts or 10000 watts)

V=voltage (in this case unknown)

I=current (in this case 15.8 amps)

rewrite the equation to be V=P/I

V = (10000 watts) / (15.8 amps)

V=632.9 volts

(I think the equation requires the units for power to be watts so you need to convert kilowatts into watts)