Browse Activities
Graham's Law of Effusion
- Graham's Law of Effusion.doc - 60 kB
| Title | Graham's Law of Effusion |
| Description | Students determine that the ratio of the rates of effusion and the average velocities of the particles of a mixture of heavy molecules and light molecules, at constant temperature,are the same. They use the ratio of the rates of effusion to determine the ratio of molar masses of the heavy (H) and light (H) molecules. |
| Subject | Chemistry |
| Level | High School |
| Type | Lab |
| Duration | 60 minutes |
| Answers Included | No |
| Language | English |
| Keywords | Effusion, Graham's Law of Effusion, Kinetic-Theory of Gases, molar mass |
| Simulation(s) | Gas Properties |
| Author(s) | Roberto Marrero |
| Contact Email | robertom@wcs.edu |
| School / Organization | Brentwood High School, Williamson Co, TN |
| Date submitted | 1/18/10 |
| Date updated | 1/18/10 |
Comments
According to the author the data that the students found was very reasonable, so using this sim to study effusion can be effective.
Trish
2/11/10
where can we find the answers?
Phantomhive
6/1/15
Authors do not typically post answers on this site because it is accessible to anyone including students. If you need help, try emailing the author. As I look at this lesson, I can imagine that the students will have variations in data, but by using a high number of cases as recommended in the directions, the velocities of the helium and nitrogen particles do match real world calculated values. The sim is designed using published kinematic values.
Trish
6/7/15
