Fuel Cell Chemistry Concepts

The video tutorial covers three types of fuel cells: hydrogen, methanol, and alkali. It explains how each type converts chemical energy into electrical energy, highlighting the environmental benefits and chemical reactions involved. The hydrogen fuel cell uses hydrogen and oxygen to produce water, while the methanol fuel cell generates carbon dioxide and water. The alkali fuel cell involves sodium hydroxide and regenerates hydroxide ions. The tutorial emphasizes the benign nature of the products and the elegance of fuel cells as energy sources.

What is the main product of a hydrogen fuel cell reaction?

• Methane

• Oxygen

• Water

• Carbon dioxide

In a hydrogen fuel cell, what is the role of the proton exchange membrane?

• To generate heat

• To break hydrogen bonds

• To allow hydrogen ions to pass through

• To produce electricity

What must be balanced in the half equations of a hydrogen fuel cell?

• Atoms

• Protons

• Neutrons

• Electrons

What are the products of a methanol fuel cell?

• Oxygen and hydrogen

• Carbon dioxide and water

• Methane and water

• Methanol and oxygen

Why is using methanol in fuel cells considered more elegant than burning it?

• It requires less methanol

• It is cheaper

• It involves no flames or fires

• It produces more energy

In methanol fuel cells, what is produced at the anode?

• Water

• Oxygen

• Methanol

• Carbon dioxide, protons, and electrons

What is regenerated at the cathode in an alkali-based fuel cell?

• Hydrogen ions

• Hydroxide ions

• Oxygen molecules

• Water molecules

What catalyst is used in alkali-based fuel cells?

• Platinum

• Silver

• Gold

• Copper

What is the role of sodium hydroxide in alkali-based fuel cells?

• To produce hydrogen

• To generate electricity

• To act as a catalyst

• To provide hydroxide ions

In alkali-based fuel cells, what happens to the water molecules?

• They are converted to hydrogen

• They are drained off

• They are used to make hydroxide ions

• They are converted to oxygen