Consider the following elementary reactions
1)�� Which reaction has the higher activation energy?
2)�� Which reactions have the same activation energy?
3)�� Which reaction is virtually temperature insensitive?
4)�� Which reaction will dominate (i.e. take place the fastest) at high temperatures if all reactions were to take place in the same reactor?
5)�� Which reaction will dominate (take place the fastest) at moderate temperatures?
6)�� Which reaction will take place the fastest at low temperatures?
7)�� Which reactions will have the same rate of reaction at a given temperature?
Consider the following elementary reactions
1)�� Which reaction has the higher activation energy?
Ans. (3)
2)�� Which reactions have the same activation energy?
Ans. (1) and (2) � Slope (�E/R) is the same.
3)�� Which reaction is virtually temperature insensitive?
Ans. (4). k4 does not vary with temperature E4 = 0.
4)�� Which reaction will dominate (i.e. take place the fastest) at high temperatures?
At high temperatures (1/T) is small and k3 becomes larger than k1. 
Ans. (3)
5)�� Which reaction will dominate (take place the fastest) at moderate temperatures?
At moderate temperatures 
Ans. (1)
6)�� Which reaction will take place the fastest at low temperatures?
At low temperature (1/T) is larger. 
Ans. (4)
7)�� Which reactions will have the same rate of reaction at a given temperature?
����� Ans. The rate will be the same when the lines cross.
����� a. (1) and (3)
����� b. (2) and (3)
����� c. (1) and (4)
����� d. (2) and (4)
����� e. (3) and (4)
The activation energy is a measure of the minimum energy a that the reacting molecules must have in order for the reaction to occur.
