Collision Theory and Catalysts

Chemistry
Class 12
3D model
English · Hindi

Collision Theory and Catalysts: a 3D model for Class 12 Chemistry, covering Molecules react only when they collide; most collisions just bounce the molecules apart., An effective collision needs energy at least equal to the activation energy and the right orientation., Raising the temperature raises the fraction of molecules with energy above the barrier, so the rate rises., A catalyst gives the reaction a path with a lower activation energy and is left unchanged at the end., Enzymes are biological catalysts; a catalytic converter turns CO and NO in exhaust into CO₂ and N₂..

Open in 3D

The 3D viewer and AR open with a free Lably account.

Also called

collision theory · activation energy · effective collision · orientation of molecules · threshold energy · rate of reaction · temperature and rate · Arrhenius equation · catalyst · catalysis · enzyme · catalytic converter · energy profile diagram · half-life · first order reaction · reaction kinetics · संघट्ट सिद्धांत · सक्रियण ऊर्जा · उत्प्रेरक · अर्ध आयु

Topics

Molecules react only when they collide; most collisions just bounce the molecules apart.
An effective collision needs energy at least equal to the activation energy and the right orientation.
Raising the temperature raises the fraction of molecules with energy above the barrier, so the rate rises.
A catalyst gives the reaction a path with a lower activation energy and is left unchanged at the end.
Enzymes are biological catalysts; a catalytic converter turns CO and NO in exhaust into CO₂ and N₂.
The half-life of a first-order reaction is constant: t½ = 0.693 / k, whatever the starting amount.
The energy profile: reactants, a hill whose height is Ea, then products; a catalyst only lowers the hill.
Rate rises roughly twofold for a 10 °C rise in temperature for many reactions.

About this model

A GLB file of about 446 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

More in Chemistry

1-Bromo-2-methylbutane molecular structureClass 123D model

1-Bromo-3-methylbutane molecular structureClass 123D model

1-Bromopentane molecular structureClass 123D model

1-Chlorobutane moleculeClass 123D model

1-Chloropropane moleculeClass 123D model

1-Ethoxy-2-nitrocyclohexane molecular structureClass 123D model