What are the advantages of using electrochemical cells compared to traditional combustion engines?

The advantages of using electrochemical cells are:

  1. Greater efficiency - Electrochemical cells convert more available energy into electrical energy.
  2. Reduced emissions - They produce significantly less pollution, such as CO2.
  3. Clean by-products - Some cells, like hydrogen fuel cells, only produce water as a waste product.

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What is the overall equation, including state symbols, for the reaction that takes place in a hydrogen-oxygen fuel cell?

2H2(g) + O2(g) ➔ 2H2O(l)

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How does a fuel cell produce electricity?

Fuel cells use the energy from a chemical reaction between a fuel (e.g. hydrogen) and oxygen to produce electricity.


Fuel cells operates continuously as long as fuel and oxygen are supplied.

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What are the disadvantages of using electrochemical cells for energy storage and generation?

The disadvantages of using electrochemical cells are:

  1. Toxic materials - Production involves toxic chemicals that must be disposed of properly to avoid environmental damage.
  2. Flammability risks - Chemicals used are often highly flammable, posing safety risks if cells overheat or catch fire.

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