Diffusion and effusion

In this activity, students investigate gaseous diffusion and effusion. After completing a laboratory experiment to gain a basic understanding of diffusion and effusion, students investigate carbon monoxide and hydrogen sulfide.

Gaseous diffusion and effusion

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Gases diffuse freely to fill the whole of the containing vessel. They can effuse through a tiny opening from a region of higher concentration to one of lower concentration.

Rights: The University of Waikato Te Whare Wānanga o Waikato

By the end of this activity, students should be able to:

• understand the difference between diffusion and effusion

• relate the diffusion of gases to the kinetic theory model for gases

• link gaseous diffusion to the movement of toxic gases like carbon monoxide and hydrogen sulfide

• provide a simple rap/poem/song to highlight the some of the dangers of poisonous gas diffusion.

Download the Word file (see link below) for:

• introduction/background notes

• what you need

• what to do.