4.2 Hydrogen Fuel Cells (Cambridge (CIE) O Level Chemistry): Flashcards

A hydrogen fuel cell is an electrochemical cell that uses hydrogen and oxygen to produce electricity, with water as the only chemical product.

True.

Water is the only chemical product — so unlike burning petrol, a hydrogen fuel cell releases no carbon dioxide or other polluting gases.

In a hydrogen fuel cell, hydrogen reacts with oxygen to produce electricity. The only chemical product is water.

A hydrogen fuel cell produces only water, so it emits no carbon dioxide or toxic gases such as carbon monoxide and nitrogen oxides that are released when petrol burns.

True.

Unlike liquid petrol, hydrogen must be stored under high pressure. It is highly flammable and potentially explosive, making storage and transport a significant safety challenge.

Hydrogen fuel cells are an advantage over petrol engines because they produce no carbon dioxide, so they do not contribute to global warming.

Hydrogen fuel cells are expensive to produce due to the materials required, and there are very few hydrogen filling stations available. Hydrogen gas is also highly flammable and difficult to store safely under pressure.