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​C7: Quiz 5
1) What is a catalyst?
 
2) Will a catalyst catalyse all reactions or just certain reactions?
 
3)
a) Define activation energy.
b) Define overall energy change (OEC).
 
4)
a) What is an exothermic reaction?
b) Draw the reaction profile for an exothermic reaction on the graph below.
Picture
c) On the same graph that you have used to answer part b, draw the reaction profile for the same reaction when a catalyst is used.
d) Is the activation energy greater with a catalyst or greater without a catalyst?
e) Does the overall energy change (OEC) change when a reaction takes place with a catalyst?
f) Does the chemical equation for a reaction change when a catalyst is used to catalyse a reaction?
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