1. /
2. CBSE
3. /
4. Class 11
5. /
6. Kinetic Theory class 11...

# Kinetic Theory class 11 Notes Physics

### myCBSEguide App

Download the app to get CBSE Sample Papers 2023-24, NCERT Solutions (Revised), Most Important Questions, Previous Year Question Bank, Mock Tests, and Detailed Notes.

CBSE Physics Chapter 13 Kinetic Theory class 11 Notes Physics in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Kinetic Theory class 11 Notes Physics latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 11 Physics notes on Chapter 13 Kinetic Theory class 11 Notes Physics are also available for download in CBSE Guide website.

## CBSE Guide Kinetic Theory class 11 Notes

CBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 11 Physics text book. Users can download CBSE guide quick revision notes from myCBSEguide mobile app and my CBSE guide website.

## Kinetic Theory class 11 Notes Physics

Download CBSE class 11th revision notes for Chapter 13 Kinetic Theory class 11 Notes Physics in PDF format for free. Download revision notes for Kinetic Theory class 11 Notes Physics and score high in exams. These are the Kinetic Theory class 11 Notes Physics prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.

CBSE Class 11 PHYSICS
Revision Notes
CHAPTER 13
KINETIC THEORY

1. Molecular nature of matter and Behaviour of gases
2. Kinetic theory of an ideal gas
3. Law of equipartition of energy
4. Mean free path

Boyle’s Law: At constant temperature volume of given mass of gas is inversely proportional to its pressure. $V\alpha \frac{1}{P}$ or PV = cons tan t

Charle’s Law: At constant pressure volume of a given mass of gas is directly proportional to its absolute temperature.
*For 1° rise in temp.
$\;{\text{Vt }} = {\text{ Vo}}({\text{1 + }}\frac{t}{{273.15}}\;\;\;)$

Gay Lussac’sLaw: At constant volume, pressure of a given mass of gas is directly proportional to its absolute temp.
$\frac{p}{T}$ = cons tan t .
For $1^\circ C$ rise in temperature ${P_t} = {P_0}\left( {1 + \frac{t}{{273.15}}} \right)$

Ideal Gas Equation: for n mole of gas
PV=nRT,
for 1 mole , PV=RT
Universal gas constant: R =8.31 J $mo{l^{ - 1}}{K^{ - 1}}$
Boltzmann constant: ${k_B} = \frac{R}{{{N_A}}}$
Where ${k_B}$= Boltzmann constant, ${N_A}$= Avogadrosno.

Ideal gas: A gas which obeys gas law strictly is an ideal or perfect gas. The molecules of such a gas are of point size and there is no force of attraction between them.

Assumptions of Kinetic Theory of Gases
1.
All gases consist of molecules which are rigid, elastic spheres identical in all respect for a given gas.
2. The size of a molecule is negligible as compared with the average distance between two molecules.
3. During the random motion, the molecules collide with one another and with the wall of the vessel. The collisions are almost instantaneous.
4. The molecular density remains uniform throughout the gas.
5. The collisions are perfectly elastic in nature and there are no forces of attraction or repulsion between them.

Law of equipartion of energy: For any thermodynamical system in thermal equilibrium, the energy of the system is equally divided amongst its various degree of freedom and energy associated with each degree of freedom corresponding toeach molecule is $\frac{1}{2}{K_B}T$, where ${k_B}$ is the Boltzmann’s constant and T is absolute temperature.

• The law of equipartition of energy holds good for all degrees of freedom whether translational , rotational or vibrational.
• A monoatomic gas molecule has only translational kinetic energy
$= \frac{1}{2}mV_x^2 + \frac{1}{2}mV_y^2 + \frac{1}{2}mV_z^2 + \frac{3}{2}2KBT$
So a monoatomic gas molecule has only three (translational) degrees of freedom.
• In addition to translational kinetic energy, a diatomic molecule has two rotational

Kinetic energies

${E_t} + {E_r}$ $=\frac{1}{2}mV_x^2+\frac{1}{2}mV_y^2+\frac{1}{2}mV_z^2+\frac{1}{{{{21}_y}}}W_y^2+ \frac{1}{{{{21}_2}}}W_z^2$

Here the line joining the two atoms has been taken as x-axis about which there is no rotation. So, the degree of freedom of a diatomic molecule is 5, it does not vibrate.
At very high temperature, vibration is also activated due to which two extra degree of freedom emerge from vibrational energy. Hence at very high temperature degree of freedom of diatomic molecule is seven.
(Each translational and rotational degree of freedom corresponds to one mole of absorption of energy and has energy (1/2)

## Kinetic Theory class 11 Notes

• CBSE Revision notes for Class 11 Physics PDF
• CBSE Revision notes Class 11 Physics – CBSE
• CBSE Revisions notes and Key Points Class 11 Physics
• Summary of the NCERT books all chapters in Physics class 11
• Short notes for CBSE class 11th Physics
• Key notes and chapter summary of Physics class 11
• Quick revision notes for CBSE exams

## CBSE Class-11 Revision Notes and Key Points

Kinetic Theory class 11 Notes Physics. CBSE quick revision note for class-11 Physics, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

To download Kinetic Theory class 11 Notes, sample paper for class 11 Physics, Chemistry, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through the best app for CBSE students and myCBSEguide website.

### Test Generator

Create question paper PDF and online tests with your own name & logo in minutes.

### myCBSEguide

Question Bank, Mock Tests, Exam Papers, NCERT Solutions, Sample Papers, Notes