1. Physics
2. Kinetic Theory of Gases

JEE & NEET Physics

Kinetic Theory of Gases: notes and previous year questions

Free notes for every topic in kinetic theory of gases, with the key formulas and real JEE and NEET questions solved step by step.

• Ideal Gas Equation and Gas LawsThe state of a gas, the kelvin scale, Boyle's, Charles's, Gay-Lussac's and Avogadro's laws, PV = nRT, units, density and Dalton's law.
• Kinetic Theory – Basic Postulates and AssumptionsBrownian motion, the ideal gas assumptions, pressure from molecular kicks, temperature as average kinetic energy, rms speed and real gases.
• Molecular Speeds – RMS, Average and Most ProbableThe Maxwell–Boltzmann distribution, the most probable, mean and rms speeds, their ratio, and how speeds depend on temperature and molar mass.
• Degrees of Freedom and Law of Equipartition of EnergyMoving, spinning and vibrating molecules, ½kT for each degree of freedom, internal energy, C_v, C_p and γ, mixtures and frozen modes.
• Mean Free Path and Molecular CollisionsHow far a molecule flies between collisions, the collision tube, λ = kT/(√2πd²P), collision frequency, vacuum and transport.