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C6
Question | Answer |
---|---|
How do you calculate the rate of reaction | Mean rate of reaction=quantity of reactant/time |
What 5 factors affect rate of reaction | -concentration (solution) -pressure (gas) -surface area (solids) -temperature -catalyst |
What is collision theory | Chemical reactions can only occur when particles collide with sufficient energy |
What is activation energy | The minimum amount of energy the particles must have in order to react |
What is a catalyst | A substance that speeds up a chemical reaction but is not used up during the reaction |
How do catalysts speed up chemical reactions | Lower activation energy |
What is an enzyme | A biological catalyst |
When is dynamic equilibrium reached | When the forward and backward reactions occur at the same rate |
What is le chantiler's principal | If you change the conditions of a reaction the system will try to counteract the change |
What happens when you decrease the temperature of a reaction in equilibrium | The equilibrium shifts in the exothermic direction |
What happens when you decrease the temperature of a reaction in equilibrium | The equilibrium shifts in the endothermic direction |
What happens when you increase the pressure of a reaction in equilibrium | The equilibrium shifts in the direction with less molecules of gas |
What happens when you decrease pressure of a reaction in equilibrium | The equilibrium shifts in the direction with more molecules of gas |
What happens when you increase concentration of a reaction in equilibrium | Equilibrium shifts to make more products |
What happens when you decrease concentration of a reaction in equilibrium | Equilibrium shifts to reduce the reactants |