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- Diffusion in liquids is much slower than in gases, because there isn't much space between the particles in a liquid for fast movement to occur. The particles diffusing are often much bigger and heavier as well which makes them slower moving.
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This model explains the higher density, greater order, and lower compressibility of liquids versus gases; the thermal expansion of liquids; why they diffuse; and why they adopt the shape (but not the volume) of their containers.
- Intermolecular Forces
The properties of liquids are intermediate between those of...
- Kinetic Molecular Theory of Gases
The average kinetic energy is the same for all gases at a...
- Intermolecular Forces
Lighter molecules tend to move faster than heavier ones at a given temperature, and so increasing mass leads to a lowering of the vapor pressure. Stronger intermolecular forces suppresses the vapor pressure; These effects are evident in 11.6.6, where we can observe several trends at a given pressure and you should be able to explain these
The type of substance - substances diffuse more quickly through gases than through liquids. This is because the particles in a gas are more spread out and move faster than the particles in a...
This principle of diffusion is fundamental throughout science, from gas exchange in the lungs to the spread of carbon dioxide in the atmosphere to the movement of water from one side of a cell’s plasma membrane to the other. However, the concept of diffusion is rarely as simple as molecules moving from one place to another.
Because the molecules of a liquid are in constant motion and possess a wide range of kinetic energies, at any moment some fraction of them has enough energy to escape from the surface of the liquid to enter the gas or vapor phase. This process, called vaporization or evaporation, generates a vapor pressure above the liquid.
This spreading out of particles in a gas (or a liquid as well) because of the random motion of the particles is known as diffusion. Note: Diffusion is often defined as the movement of a substance from an area of high concentration to an area of low concentration.
Why do liquid molecules diffuse more slowly than gases? Flexi Says: Both diffusion and effusion are related to the speed at which various molecules move. Diffusion in gases (mixing) is nearly instantaneous. If you release a colored gas in a container of non-colored gas, the color spreads evenly throughout the container in a second or two.
