The speed of the molecules in a gas is proportional to the temperature and is inversely proportional to molar mass of the gas. In other words, as the temperature of a sample of gas is increased, the molecules speed up and the root mean square molecular speed increases as a result.
Which of the following explains the mechanisms of diffusion?
Which of the following explains the mechanism of diffusion? ... The greater the concentration gradient, the faster the diffusion rate .
Which factors does molecular speed depend on quizlet?
The speed of the molecules in a gas is proportional to the temperature and is inversely proportional to molar mass of the gas. In other words, as the temperature of a sample of gas is increased, the molecules speed up and the root mean square molecular speed increases as a result.
What are the two things that need to be present in order for diffusion to occur?
For diffusion to occur there must be a concentration difference . In diffusion, a substance moves from an area of high concentration to an area of low...
Which should be present in order for diffusion to occur?
In order for diffusion to occur, there must be a: Concentration gradient . Which of the following best describes molecular motion? Molecules move in random directions.
What happens when the speed of molecules increase?
If the temperature is increased , the average speed and kinetic energy of the gas molecules increase. If the volume is held constant, the increased speed of the gas molecules results in more frequent and more forceful collisions with the walls of the container, therefore increasing the pressure (Figure 1).
How does the speed of molecules affect matter?
An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. Cooling a liquid decreases the speed of the molecules. A decrease in the speed of the molecules allows the attractions between molecules to bring them a little closer together.
What are the 3 types of diffusion?
- (i) Simple diffusion is when ions or molecules diffuse from an area of high concentration to an area of low concentration.
- (ii) In osmosis, the particles moving are water molecules.
What are the factors that affect diffusion rate?
| Factor Reason | The temperature The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. | The surface area of the cell membrane separating the different regions The greater the surface area, the faster the rate of diffusion. |
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What are the two types of diffusion mechanism?
Diffusion can occur by two different mechanisms: interstitial diffusion and substitutional diffusion .
What is required for diffusion to occur quizlet?
in order to diffuse, the passage across the membrane must be enabled or helped. moves solute from areas of low concentration to high concentration (against gradient). opposite of diffusion; requires transport protein and energy (ATP).
What is an example of diffusion in animals?
Replay DIFFUSION IN ANIMAL CELLS Diffusion in animal cells. Another example of diffusion in animal cells is the exchange of carbon dioxide and oxygen between the alveoli in the lungs and the blood.
What is the order of diffusion?
Since rate of diffusion is inversely proportional to the density of molecular substance, so rate of diffusion will be highest for gaseous state in respect to the rate of liquid and solid state. Since the order of density is solid > liquid > gas, so the order of diffusion rate of diffusion will be gas > liquid > solid .
Which state of matter has more rate of diffusion?
The distance between the particles is more in gases than liquids which results in fast diffusion in gases than liquids. So the kinetic energy is more in gases particles so the diffusion in gases is more quicker than in liquid.
Why does diffusion occur?
Diffusion occurs when particles spread . They move from a region where they are in high concentration to a region where they are in low concentration. Diffusion happens when the particles are free to move.
What is the rate of diffusion of a gas?
Graham’s law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight .
