explosions and surface area 3.0 / 5 based on 1 rating ? ChemistryGCSEAQA Created by: Belle StoreyCreated on: 11-01-13 16:29 What can combustible powders cause? explosions 1 of 7 What happens when some powders react with oxygen? it makes large volumes of carbon dioxide and water vapour 2 of 7 Why must owners of a factory using combustible powders be careful? they must ensure that the powders can't reach the open atmosphere and that the chances of spark being produced near the powders is very small. 3 of 7 What does breaking up a block into smaller pieces do increases surface area 4 of 7 What happens as the surface area of a solid is increased rate of reaction increases 5 of 7 why do powders (instead of solids) increase collision frequency? they can spread through a reaction mixture 6 of 7 why is collision frequency less in a block of material? collisions can only occur with the particles on the surface 7 of 7
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