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Rates of reaction.
Member rating: No Rating | Words: | Submitted: Mon Jan 26 2004
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RATES OF REACTION BY FAHAD ASHRAF Background Knowledge The rate of a chemical reaction is a measure of how fast the reaction takes place. In order for a chemical reaction to take place, the reactant particles must collide with each other, and a fixed amount of energy called the activation energy (Ea) must be reached. If a collision between particles can produce sufficient energy (i.e. if the particles collide fast enough and in the right direction) a reaction will take place. Not all collisions will result in a reaction. The rate of reaction increases if there is an increase in the total number of collisions. This is called collision theory (see diagram below). . The following factors affect the rate of a reaction: - Temperature The rate of a chemical reaction increases as the temperature increases. A rough rule of thumb, which applies to many reactions at around room temperature, is that a 10oC increase...
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