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Energy in reactions

Last updated about 1 year ago

12 questions

1

1

1

1

2

1

5

1

1

1

1

1

Question 1

1.

Question 2

2.

Question 3

3.

Question 4

4.

Question 5

5.

Question 6

6.

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

Question 7

7.

Draggable item		Corresponding Item

Use the following graph to answer the questions that follow:

Question 8

8.

Question 9

9.

Question 10

10.

Question 11

11.

Question 12

12.

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

∆H = - 456 kJ/mol

∆H = + 547 kJ/mol

∆H = - 38 kJ/mol

∆H = + 1456 kJ/mol

A

B

C

D

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

a

b

c

d

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

a

b

c

d

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

Is the following statement True or False?

True

False

Match the following values for the graph shown above: 

∆H of reverse reaction

40 kJ

∆H of forward reaction

15 kJ

Energy released when new bonds form

-25 kJ

Potential energy of products

25 kJ

Potential energy of reactants

-35 kJ

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

a

b

c

d

e

f

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

a

b

c

d

e

f

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

a

b

c

d

e

f

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

a

b

c

d

e

f

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

a

b

c

d

e

f