Unformatted text preview: the rate of a reaction. Temperature
· At higher temperature, the increase in kinetic energy of mo lecules allows them to collide more often and wit h more energy, creating more effective collisions.
· In general, raising the temperature of a reaction by 10°C doubles the rate of the reaction. Addition of a Catalyst
· Addit io n of a catalyst increases the rate of the reaction by decreasing the activation energy for the reaction. As a result, more collisio ns possess the required energy and form product successfully. 3 Chemistry 52 Chapter 16 CHEMICAL EQUILIBRIUM
· In many react ions the products can combine and revert back to reactants. When a reaction occurs both in forward and reverse direct ions it is called a reversible reaction. For example: Forw ard reaction: 2 SO 2 (g) + O2 (g) ¾¾ 2 SO 3 (g) ®
Reverse reaction: 2 SO 3 (g) ¾¾ 2 SO 2 (g) + O 2 (g)
· The forward and reverse reactions are usually shown in one equat ion by using a double arrow. ¾¾
2 S O 2 (g) + O 2 (g) ¬¾ 2 SO 3 (g)
· In a reversible reaction, the rate...
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