Effusion and Diffusion

Seeing how pressure, volume, temperature, and moles work and play together Diffusing and effusing at different rates... 

No distinction is made between diffusion and effusion, and Graham s law is erroneously used in explaining the data. 

Run the Diffusion and Effusion activity (eChapter 9.7). Assume that the time represented is 1 minute, and determine the rate of effusion for each of the gases. What is the mass ratio of the two gases ... 

It is important that you understand the difference between diffusion and effusion, although the terms are similar. Diffusion is the movement of particles from an area of high concentration (high partial pressure) to an area of low concentration (low partial pressure). A... 

Describe how mass affects the rates of diffusion and effusion. 

Diffusion and effusion According to the kinetic-molecular theory, there are no significant forces of attraction between gas particles. Thus, gas particles can flow easily past each other. Often, the space into which a gas flows is already occupied by another gas. The random motion of the gas particles causes the gases to mix until they are evenly distributed. Diffusion is the term used to describe the movement of one material through another. The term may be new, but you are probably familiar with the process. If you are in the den, can you tell when someone sprays perfume in the bedroom Perfume particles released in the bedroom diffuse through the air until they reach the den. Particles diffuse from an area of high concentration (the bedroom) to one of low concentration (the den). 

Because there are no significant forces of attraction between gas particles, gases can diffuse and effuse at rates determined by the mass of the particles. 

Compare diffusion and effusion. Explain the relationship between the rates of these processes and the molar mass of a gas. (13.1)... 

Describe molecular motion, diffusion, and effusion of gases... 

We will see how the kinetic molecular theory of gases, which is based on the properties of individual molecules, can be used to describe macroscopic properties such as the pressure and temperature of a gas. We learn that this theory enables us to obtain an expression for the speed of molecules at a given temperature, and understand phenomena such as gas diffusion and effusion. (5.7)... 

In diffusion, two gases gradually mix with each other. In effusion, gas molecules move through a small opening under pressure. Both processes are governed by the same mathematical law—Graham s law of diffusion and effusion. 

What is the difference between gas diffusion and effusion State Graham s law and define the terms in Equation (5.17). 

Thomas Graham determined that the rates of diffusion and effusion of gases are inversely proportional to the square roots of their molecular or atomic weights. This is Graham s Law. In general, it says that the lighter the gas, the faster it will effuse (or diffuse). Mathematically, Graham s Law looks like this ... 

---