Kinetic Theory — Class 11 CBSE Physics revision notes
A 5-page visual revision sheet for Kinetic Theory, written for Class 11 CBSE Physics. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
Page 1 as PDF
Kinetic Theory in one look
temperature is nothing but molecules moving faster, pressure is nothing but them hitting the wall
The molecular picture of matter
- matter is made of atoms and molecules in constant, random motion, never actually at rest
- ideal gas model: molecules are point-sized, exert no force except during a collision
- every collision is taken as perfectly elastic, the simplification the whole chapter rests on
The ideal gas equation, n moles
- T fixed (Boyle's law) — pressure and volume trade off
- P fixed (Charles' law) — volume tracks temperature
- V fixed (Gay-Lussac's law) — pressure tracks temperature
Page 1 of 5. The full sheet, all 5 pages, opens free in the app.
What this Kinetic Theory sheet covers
- The molecular picture of matter
- The ideal gas equation, n moles
- The three gas laws in a cylinder
- In the lab: Boyle's apparatus
- Avogadro's number and the mole
- Avogadro's number
- one mole of any ideal gas at STP occupies
- ideal gas equation, N molecules
- Assumptions of the kinetic model
- Symbols
- Pressure of an ideal gas
- one molecule, the push on the wall at each hit
- time between two hits on that wall
- average force from that one molecule
- no direction is preferred
- pressure, N molecules of mass m in volume V
- in terms of density ρ = Nm/V
- Temperature, the kinetic view
- Speeds of gas molecules
- root mean square speed
- average speed
- most probable speed
- always in this order
- Law of equipartition of energy
- Degrees of freedom by molecule type
- Specific heats from equipartition
- molar specific heat at constant volume
- molar specific heat at constant pressure
- ratio of specific heats
- Mean free path
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Physics chapter by chapter against your real exam dates and free hours, and when the plan reaches Kinetic Theory the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.