Question

3d2
You have been asked to find out the best material for insulating a hot water tank.
You have three materials: aluminium foil, cotton wool and expanded polystyrene.
Describe an experiment to compare the effectiveness of these materials.
Include in your description the way you would use your results to decide the most
effective material.

Answer 1

The most effective insulating material is polystyrene.

What is insulating material?

The material which isolates the body and doesn't allow heat and mass to flow out of the control system.

The insulating material should have the lowest thermal conductivity.

Polystyrene foam has low thermal conductivity which makes it a great insulator to heat.

Aluminum foil can be an effective insulating material because it doesn't flow heat out into the environment.

Cotton wool is effective, but not it is not fire resistant.

Thus, the best effective insulating material is polystyrene.

Learn more about  insulating material.

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