Free expansion and entropy
Remove a partition and watch molecules fill both halves; the probability of going back is 2^-N and Delta S = N k ln 2.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 11. Thermodynamics |
| NCERT section | 11.9 |
| Level | Advanced (JEE / Olympiad) |
| Time | about 14 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: entropy · free expansion · second law · probability