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Chemistry

GCSE · Edexcel

QuestionsFlashcards

Group 1
- Group 1 (Alkali Metals)
  6
- Group 1: Reactivity & Electronic Configurations
  6
Group 7
Group 0

Qualitative Analysis: Tests for Ions
Hydrocarbons
Polymers
Alcohols & Carboxylic Acids
Bulk & Surface Properties of Matter Including Nanoparticles
- Nanoparticles
  7
- Ceramics, Polymers, Composites & Metals
  5

Fuel Cells Flashcards

All 4 cards in this deck

True or false? A hydrogen–oxygen fuel cell produces carbon dioxide as well as water.: False. Water is the only product.
What is the overall balanced equation for the reaction in a hydrogen–oxygen fuel cell?: $2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}$
Give one strength of using a hydrogen–oxygen fuel cell rather than a rechargeable chemical cell to power a vehicle.: It gives a constant voltage for as long as hydrogen and oxygen are supplied.

(It also does not discharge when left unused, and contains no toxic substances to dispose of.)
Why are the electrodes of a hydrogen–oxygen fuel cell made from an unreactive metal such as platinum?: So they conduct electricity but are not used up — they do not react with the hydrogen, oxygen or water.