Kinetic Theory Class 11 Physics Notes – Formulas & Quick Revision

Kinetic Theory gases ko molecular level par explain karti hai — pressure, rms speed aur degrees of freedom ke formulas yahan hain. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.

Important Formulas & Concepts — Kinetic Theory

• PV = nRT = NkT
• P = (1/3)ρv²_rms
• v_rms = √(3RT/M); v_avg = √(8RT/πM); v_mp = √(2RT/M)
• v_mp < v_avg < v_rms
• KE per molecule = (3/2)kT; per mole = (3/2)RT
• Degrees of freedom: mono 3, diatomic 5, triatomic non-linear 6
• Equipartition: energy per DOF = ½kT; U = (f/2)nRT
• γ = 1 + 2/f; diatomic: Cv = (5/2)R, γ = 7/5

Quick Revision Points

• Temperature molecular KE ka measure hai
• Mean free path λ = 1/(√2·πd²n)
• Same T par halki gas ke molecules tez chalte hain
• Diatomic gas ke liye γ = 1.4 — numericals mein common
• Formula-based direct questions — easy marks

FAQ

Ye chapter chhota hai, skip kar sakte hain?

Bilkul nahi — formula-based direct questions aate hain, easy marks hain.

γ values yaad karne ka trick?

PDF mein DOF-based ek hi table se saari γ values nikal sakte ho.

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