Explanation: When the cell increases in size, the volume increases faster than the surface area , because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective. ... this is actually why cells divide.
How does the size of a molecule affect the rate of diffusion?
We know that higher the molecular mass bigger is the size of the molecule. The expression for the Graham’s law of diffusion shows that the rate of diffusion is inversely proportional to the molecular mass i.e. the rate of diffusion is inversely proportional to the size of the molecule.
Why does cell size affect the rate of diffusion?
When a cell’s surface area increases , the amount of substances diffusing into the cell increases. As volume and surface area increase, the volume increases faster, so much so that the surface area available to allow substances in halves each time the cell volume doubles.
How does size affect the rate of diffusion quizlet?
Larger the surface area, the the higher the rate of diffusion . How does the thickness of membranes affect the rate of diffusion? The thinner the membrane, the higher the rate of diffusion. Diffusion without the presence of a membrane/barrier.
What shape is best for diffusion?
The P values shown on table 2 indicate that the cube had a faster rate than the pineapple, the pineapple had a quicker time than the tree and the tree had a faster time than the oval. Thus, means that these shapes are more efficient at diffusion.
What is the relationship between cell size and diffusion?
When the cell divides, it forms two smaller cells which each have a larger surface to volume ratio . Given a set rate of diffusion, the center of the new smaller cells will be able to have vital nutrients reach the center of the cell.
What will decrease the rate of diffusion?
Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules , thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusion decreases.
Which condition will allow diffusion to occur faster?
The greater the difference in concentration, the quicker the rate of diffusion. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. The greater the surface area , the faster the rate of diffusion.
What was the factor in the difference in diffusion rates quizlet?
Increased surface area increases the rate of diffusion, whereas a thicker membrane reduces it. The greater the distance that a substance must travel, the slower the rate of diffusion.
What shape has the fastest diffusion time?
Explanation: The sphere is the fastest because it has the highest surface area. The cylinder has the second highest, and the cube has the lowest. The greater the surface area, the faster the rate of diffusion.
Is a round shape better for diffusion?
Diffusion is like going through a net or sieve . Smaller sizes and shapes pass through more easily than large ones.
Does the shape of a container affect diffusion?
Conclusions. Temperature and the shape of the containers affected the rate of diffusion in both experiments . ... The narrow shape of the containers used in the second experiment slowed down diffusion because of the container’s effect on Brownian motion (the mechanism behind diffusion).
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. This is true in gases and for particles dissolved in solutions – but diffusion does not occur in solids.
How do you calculate rate of diffusion?
- rate of diffusion=amount of gas passing through an areaunit of time.
- rate of effusion of gas Arate of effusion of gas B=√mB√mA=√MB√MA.
What is the relationship between rate of diffusion and surface to volume ratio?
When the cell increases in size, the volume increases faster than the surface area , because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective.
What are the 5 factors that affect diffusion?
Several factors affect the rate of diffusion of a solute including the mass of the solute, the temperature of the environment, the solvent density, and the distance traveled .
