## What is diffusion rate chemistry?

rate of diffusion=amount of gas passing through an areaunit of time. The diffusion rate depends on several factors: the concentration gradient (the increase or decrease in concentration from one point to another); the amount of surface area available for diffusion; and the distance the gas particles must travel.

**What is Graham’s law of diffusion?**

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 diffusion in chemistry ks3?

Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration . Diffusion occurs in liquids and gases when their particles collide randomly and spread out.

**What is effusion Class 11?**

Effusion is a process in which air escapes or leaks through a hole whose diameter is considerably smaller than mean free path of molecules. Under these circumstances, all the molecules which reaches the hole will pass through, as collisions between molecules in these places will be negligible.

## Do lighter gases effuse faster?

Explanation: The rate of effusion of a gas is inversely proportional to the square root of the molecular weight of the gas. The lighter a gas is, the faster it will effuse; the heavier a gas is, the slower it will effuse.

**How do you calculate the rate of diffusion?**

– D is the diffusion coefficient of a solute in free solution. The diffusion coefficient determines the time it takes a solute to diffuse a given distance in a medium. – x is the mean distance traveled by the diffusing solute in one direction along one axis after elapsed time t. – t is the elapsed time since diffusion began.

### What is the equation for diffusion?

Graham’s law states that the rate of diffusion or effusion of a gas is inversely proportional to the square root of its molar mass. See this law in equation form below. In these equations, r = rate of diffusion or effusion and M = molar mass.

**How to calculate and solve for diffusion coefficient?**

for the diffusion coefficient in a binary mixture is obtained by Bird, Hirshfelder and Curtiss. Here, Ω = f (kT/ε AB) is the collision integral and k is the Boltzmann’s constant. The interaction parameters ε AB and σ AB determined for the binary system from the appropriate constants for pure substances:

## What is the rate of diffusion in chemistry?

The rate of diffusion, dn/dt, is the change in the number of diffusing molecules inside the cell over time. Since the net movement of diffusing molecules depends on the concentration gradient, the rate of diffusion is directly proportional to the concentration gradient (dC/dx) across the membrane. Similarly, what is a simple definition of diffusion?