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Energy in reactions

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Last updated about 1 year ago
12 questions
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Question 1
1.

Which of the following reactions releases most energy to the surroundings?

Question 2
2.

Question 3
3.

The energy profile graphs for four different reactions are shown. Which reaction requires the most energetic collisions to reach the activated complex?

Question 4
4.

The following energy profiles for four different reactions are shown. Which reaction is the most exothermic?

Question 5
5.

Consider the four energy profile graphs shown below:

Identify the two diagrams that could represent the same reaction cataysed and uncatalysed.

  • graph 1
  • graph 2
  • graph 3
  • graph 4
  • Graph showing reaction with catalyst present
  • Graph showing reaction with NO catalyst present
Question 6
6.

Is the following statement True or False?

The following graph must be used to answer the questions that follow:
Question 7
7.

Match the following values for the graph shown above:

Draggable itemarrow_right_altCorresponding Item
∆H of forward reaction
arrow_right_alt
40 kJ
Potential energy of reactants
arrow_right_alt
15 kJ
Potential energy of products
arrow_right_alt
-25 kJ
∆H of reverse reaction
arrow_right_alt
25 kJ
Energy released when new bonds form
arrow_right_alt
-35 kJ
Use the following graph to answer the questions that follow:
Question 8
8.

Which of the letters (a-f) represents the energy of the products?

Question 9
9.

Which of the letters (a-f) represents the energy of the activated complex?

Question 10
10.

Which of the letters (a-f) represents the activation energy (forward reaction)?

Question 11
11.

Which of the letters (a-f) represents the heat of reaction (forward reaction)?

Question 12
12.

Which of the letters (a-f) represents the activation energy for the reverse reaction?