You will explore Grahams law of effusion by comparing the rate of effusion of two gases with the square root of their molar masses.
After completing this tutorial, you will be able to complete the following:
Graham's Law states that the rate of effusion of a gas is inversely proportional to the molar mass of the gas. The lighter the gas, the faster it will effuse. Using Graham's Law, the identity of an unknown gas can be determined if it is compared to a known gas. The rate of gas 1 divided by the rate of gas 2 is equal to the square root of the molar mass of gas 2 divided by the square root of the molar mass of gas 1:
|Approximate Time||20 Minutes|
|Pre-requisite Concepts||Learners should know diffusion, isotopes, molar mass and rate.|
|Type of Tutorial||Concept Development|
|Key Vocabulary||chemistry, diffusion, effusion|