Chemical Kinetics Class 12 Chemistry Notes – Formulas & Quick Revision

Chemical Kinetics mein rate laws, order of reaction aur Arrhenius equation aate 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 — Chemical Kinetics

• Rate = k[A]^x[B]^y; order = x + y
• Zero order: [A] = [A]₀ − kt; t½ = [A]₀/2k
• First order: k = (2.303/t)·log([A]₀/[A])
• First order t½ = 0.693/k (concentration-independent)
• Arrhenius: k = A·e^(−Ea/RT)
• log(k₂/k₁) = (Ea/2.303R)(1/T₁ − 1/T₂)
• Rate temperature coefficient ≈ 2-3 per 10°C
• Units of k: first order s⁻¹, zero order mol L⁻¹s⁻¹

Quick Revision Points

• Order experimental hai, molecularity theoretical
• First order ka t½ concentration par depend nahi karta — pehchan hai
• Catalyst Ea ghatata hai, ΔH nahi badalta
• log k vs 1/T graph ka slope = −Ea/2.303R
• Pseudo first order: ester hydrolysis (water excess)

FAQ

Order determine kaise karte hain?

Initial rate method + integrated rate law — dono ke solved examples PDF mein hain.

Graphs kaunse important hain?

[A] vs t, log[A] vs t, k vs 1/T — teeno ke shapes PDF ke visual sheet mein hain.

Explore more: free sample notes, free calculators aur interactive simulators.