Temperature and chemical reactions

Référence de la vidéo 11946054
Temperature and chemical reactions. Animation showing the effect of temperature on collision frequency between molecules, an example of the collision theory of chemical reactions. The animation starts with two boxes of equal volume containing gas or liquid molecules. The box at left is at 25 degrees Celsius, while the box at right is at 50 degrees Celsius. The number of collisions (shown at bottom in each box) is recorded over a period of 15 seconds (timer at top centre). The rate of collisions is approximately twice as fast in the box at a higher temperature, leading to a faster reaction rate. Collision theory is closely related to reaction kinetics. For similar animations showing the effects of surface area and concentration on collision frequency, see clips K005/4858 and K005/4860.
Licence : Droits gérés
Crédit : Science Photo Library / RHYS LEWIS, AHS, DECD, UNISA
Model Release : Non requis
Durée : 20 Secondes
Aspect ratio : 16/9
Restrictions : -

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