Physical · Chemical Dynamics
Chemical Dynamics — Reaction-Rate Theories
Exam-focused revision notes on Chemical Dynamics — Reaction-Rate Theories for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.
The core idea
The empirical Arrhenius equation fits the data but does not explain why reactions speed up with temperature. Collision theory pictures reaction as successful collisions; transition-state theory pictures it as passage over a barrier — and brings in entropy.
What this note covers
- 1The core idea
- 2Collision Theory
- 3Transition-State Theory (Activated-Complex Theory)
- 4Meaning of ΔH‡ and ΔS‡
- 5Link between the two theories and Arrhenius
- 6Potential-energy surface & reaction coordinate
- 7Common traps students miss
- 830-second recall table
Read the full note
The remaining 7 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.
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