I NEED HELP PLEASE 1

[Mechdod]

What is the specific Energy for hydrogen and how can i caculate the Mass of hydrogen required to produce electricity for a day at an Eff of 90%

THANKS

 

[kenvlach]

To produce one electron (e^-) per day in a 90% efficient fuel cell via the overall reaction

0.5 H₂ + 0.25 O₂ --> 0.5 H₂O + e^-

requires 1.111... molecule of H₂ per day, or 3.7 x 10^-24 grams/day.

Just multiply if your electrical needs are greater.

 

[Mechdod]

please can u explain in detail.

Thanks

 

[kenvlach]

One electron (e^-) has a charge of 1.6022 x 10^-19 Coulomb.
1 ampere = 1 coulomb/second
Therefore, a 1 Ampere current requires 6.2426 x 10¹⁸ electrons/second.