Question

Select the correct answer from each drop-down menu . a hydrogen fuel cell is more efficient than a combustion reaction because very little of the released energy is released__. When used at home, a fuel cell eliminates the need for ___because thr cell is portable

Heat
Electrical energy
Chemical energy



Oxygen
Hydrogen
An electrical grid

Answer 1

The first one is heat, the second one is electrical grid. Hope I helped! :)

Answer 2

Heat

Electrical grid

Step-by-step explanation:

A hydrogen fuel cell works by converting the chemical energy of hydrogen and oxygen to electricity with the means of redox reactions reactions. It has an efficiency in the range of 40–60%. This means only 60-30% of the energy is lost as waste heat.

The mechanism of with which the fuel cell works does not require electricity so an electrical grid would not be required.