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Bromine diffusion

Bromine diffusion

A150/0309

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Credit

ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

Bromine diffusion. Image 1 of 2. Bromine vapour (orange) diffusing upwards to fill two gas jars. Bromine liquid is weakly bonded, and so it will readily evaporate at room temperature. Because gas molecules can move independently of each other and do so randomly, a gas spreads out from its source in a process called diffusion. The diffusion rate depends mainly on the temperature (affecting the speed of the gas molecules) and the medium through which the diffusion takes place. In this case, the medium is air. The gas colour allows the diffusion to be observed. For the vapour diffused throughout the glass jars, see image A150/310.

Release details

Model release not required. Property release not required.

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