## How does temperature affect the rate of diffusion of molecules?

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.

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## What is the relationship between rate of diffusion and molecular mass?

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.

**What is the relationship between temp and rate of diffusion?**

Increasing the temperature will cause the rate of diffusion to increase.

**What effect does molecular size and temperature have on rate of diffusion?**

Molecules diffuse faster at warmer temperatures than at cooler temperatures. Smaller molecules tend to diffuse faster than larger molecules.

### Why does the rate of diffusion change with temperature?

Diffusion is caused by the movement of atoms or molecules from an area of higher concentration to one of lower concentration. As temperature increases, the kinetic energy of matter increases and more intermixing of matter takes place.

### What are the 3 factors that affect the rate of diffusion?

Factors that Affect the Rate of Diffusion:

- Difference in concentration affects the rate of diffusion. The greater the concentration gradient, the quicker diffusion takes place.
- The temperature affects the rate of diffusion.
- The surface area of the membrane affects the rate of diffusion.
- Distance.

**What are the factors that can affect the rate of diffusion?**

The rate of diffusion is affected by the concentration gradient, membrane permeability, temperature, and pressure. Diffusion takes place as long as there is a difference between the concentrations of a substance across a barrier.

**What is the relationship between rate of diffusion and cell size?**

The surface-to-volume ratio of a sphere is 3/r; as the cell gets bigger, its surface-to-volume ratio decreases, making diffusion less efficient. The larger the size of the sphere, or animal, the less surface area for diffusion it possesses.

#### Why rate of diffusion is inversely proportional to temperature?

Diffusion is faster at higher temperatures because the gas molecules have greater kinetic energy. Graham’s Law states that the effusion rate of a gas is inversely proportional to the square root of the mass of its particles.

#### Do smaller or bigger molecules diffuse faster?

This laboratory shows that diffusion of molecules occurs in gels. It also shows that molecules diffuse faster at higher temperature and small molecules diffuse faster than larger ones.

**What happens to the rate of diffusion if the temperature is increased?**

As we increase the temperature, the rate of diffusion becomes faster due to an increase in the kinetic energy of particles.

**What are the main 5 factors that affect the rate of diffusion of a molecule?**

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.

## How does the molecular weight affect diffusion?

Diffusion coefficients decreased with increasing molecular weight for both linear and globular molecules; and the linear molecules had further reduced diffusivity than globular molecules with comparable molecular weights.

## Why does molecular size affect rate of diffusion?

Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.

**What do diffusion rates depend on?**

**What is the rate of diffusion formula?**

Again we know that molecular mass = 2 × vapour density or M = 2D. This formula is used to calculate the rate of diffusion in terms of the molecular weight of gases.

### What 4 factors affect the rate of diffusion?

### Why do heavier molecules diffuse slower?

If they can move faster, then they can also diffuse faster. Conversely, when the kinetic energy associated with the molecules decreases so does their movement. As a result, the rate of diffusion will be slower. Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion.

**What 3 factors can affect the rate of diffusion?**

**What are the 3 factors that affect the rate of diffusion explain?**

#### Do lighter molecules diffuse faster?

The rates of both diffusion and effusion depend on the average speed of the gas molecules. So lighter molecules diffuse and effuse faster than heavier molecules.

#### Does change in temperature affect 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.

**Do heavier molecules diffuse faster?**

Mass of the molecules diffusing: Heavier molecules move more slowly; therefore, they diffuse more slowly. The reverse is true for lighter molecules. Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion.

**Which factors would increase the rate of diffusion?**