Diffusion and Factors Affecting Its Rate

The video explains diffusion as the movement of materials from high to low concentration. It covers factors affecting diffusion rate, including concentration gradient, temperature, molar mass, surface area, and membrane thickness. Higher concentration gradients and temperatures increase diffusion rates, while larger molar masses and thicker membranes decrease them. Surface area also plays a role, with larger areas facilitating faster diffusion.

What is diffusion?

• Movement of material from high to low concentration

• Movement of material from low to high concentration

• Movement of material within the same concentration

• Movement of material against the concentration gradient

Which factor increases the rate of diffusion when its magnitude increases?

• Molar mass

• Temperature

• Surface area

• Concentration gradient

How does temperature affect the rate of diffusion?

• Higher temperatures decrease the rate

• Higher temperatures reverse the direction of diffusion

• Higher temperatures have no effect

• Higher temperatures increase the rate

What happens to the rate of diffusion as the molar mass of a gas increases?

• It increases

• It decreases

• It remains constant

• It becomes unpredictable

Which gas will diffuse faster assuming equal conditions: oxygen or carbon dioxide?

• Oxygen

• Carbon dioxide

• Both diffuse at the same rate

• Neither will diffuse

How does surface area affect the rate of diffusion?

• Surface area reverses the direction of diffusion

• Larger surface area decreases the rate

• Larger surface area increases the rate

• Surface area has no effect

What is the relationship between membrane thickness and diffusion rate?

• Thicker membranes increase the rate

• Thicker membranes decrease the rate

• Thicker membranes reverse the direction of diffusion

• Membrane thickness has no effect

Which of the following factors is directly proportional to the rate of diffusion?

• Molar mass

• Surface area

• Membrane thickness

• Distance traveled

What is the effect of increasing the distance gas particles must travel on the rate of diffusion?

• It has no effect

• It reverses the direction of diffusion

• It decreases the rate

• It increases the rate

Which of the following is NOT a factor affecting the rate of diffusion?

• Temperature

• Color of the gas

• Concentration gradient

• Molar mass