Credit: RHYS LEWIS, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: Surface area and chemical reactions. Animation showing the effect of the surface area of a solid reactant on collision frequency between liquid or gas molecules and the solid surface, an example of the collision theory of chemical reactions. The animation starts with two boxes of equal volume containing gas or liquid molecules with a solid reactant. The box at left has a lower surface area of solid exposed than in the box at right (where the surface area has doubled). 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 two times as fast in the box with a higher surface area, leading to a faster reaction rate. Collision theory is closely related to reaction kinetics. For similar animations showing the effects of temperature and concentration on collision frequency, see clips K005/4852 and K005/4860.

Release details: Model release not required. Property release not required.

Keywords: animated, animation, catalysis, catalyst, catalytic, chemical, chemistry, colliding, collision, collision frequency, collision theory, collisions, comparing, comparison, educational, gas, graphic, illustration, kinetic energy, liquid, measuring, molecular, molecule, molecules, no-one, nobody, physical chemistry, reaction kinetics, reaction rate, recorded, school science, sequence, series, solid, surface area, surface chemistry, surface science, timed, timer, white background

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Surface area and chemical reactions

K005/4858 Rights Managed

Downloadable master

Duration: 00:00:20.01

Frame size: 1920x1080

Frame rate: 24

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 195.0M

Original

Capture format: QuickTime Animation

Codec: Animation

Please contact Science Photo Library if you require the original, or other formats.

 

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