Cambridge O Level Chemistry · Syllabus 5070 · Electrochemistry
Hydrogen-oxygen fuel cell
What is Hydrogen-oxygen fuel cell?
A cell that uses hydrogen and oxygen to produce electricity, with water as its only chemical product. It is supplied continuously with its two reactants rather than being charged, and is compared with a petrol engine in vehicles by weighing the water-only output at the point of use against the cost and difficulty of producing, storing, transporting and supplying the hydrogen.
This definition is part of the Electrochemistry chapter in Cambridge O Level Chemistry.
Hydrogen-oxygen fuel cell in context
A hydrogen-oxygen fuel cell uses hydrogen and oxygen to produce electricity, and water is its only chemical product. That single sentence is the examinable fact. Everything else in Section 4.2 is a comparison.
A hydrogen-oxygen fuel cell uses hydrogen and oxygen to produce electricity, and water is its only chemical product.