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Questions and Answers
What causes the movement of molecules during diffusion?
What causes the movement of molecules during diffusion?
- Constant random movement of molecules (correct)
- A significant decrease in pressure
- The application of heat to the substance
- The molecules gaining potential energy
Which statement best describes the relationship between concentration gradient and the rate of diffusion?
Which statement best describes the relationship between concentration gradient and the rate of diffusion?
- The rate of diffusion is unaffected by the concentration gradient.
- A steeper concentration gradient increases the rate of diffusion. (correct)
- A steeper concentration gradient decreases the rate of diffusion.
- A shallower concentration gradient increases the rate of diffusion.
During the experiment with bromine, what state does bromine transition into when it is poured into a gas jar?
During the experiment with bromine, what state does bromine transition into when it is poured into a gas jar?
- A solid
- A vapor (correct)
- An aerosol
- A gas
What is indicated by a concentration gradient?
What is indicated by a concentration gradient?
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Which factor most directly slows the rate of diffusion in a given space?
Which factor most directly slows the rate of diffusion in a given space?
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Study Notes
Diffusion
- Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration.
- Diffusion continues until the molecules are evenly distributed.
- The rate of diffusion is affected by the concentration gradient.
- A steep concentration gradient results in faster diffusion.
- A less steep concentration gradient results in slower diffusion.
Diffusion in Gases
- Bromine is a volatile liquid at room temperature, meaning it readily vaporizes.
- When bromine vaporizes, its molecules diffuse into the surrounding air.
- This demonstration shows how molecules move from a region of higher concentration (the bromine vapor) to a region of lower concentration (the surrounding air).
- The diffusion process allows bromine to fill the available space.
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