Calculating bond energies

This lesson, students will calculate bond energy values and use them to predict whether a reaction will be exothermic or endothermic. Students will relate bond energies to the correct part of energy level diagrams.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What happens to bonds during a chemical reaction?

1/5

Q2.What is the activation energy?

2/5

Q3.Which arrow in the energy level diagram represents activation energy?

3/5

Q4.Which arrow in the energy level represents the overall energy change?

4/5

Q5.What type of reaction is shown in the energy level diagram?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What happens to bonds during a chemical reaction?

1/5

Q2.What is the activation energy?

2/5

Q3.Which arrow in the energy level diagram represents activation energy?

3/5

Q4.Which arrow in the energy level represents the overall energy change?

4/5

Q5.What type of reaction is shown in the energy level diagram?

5/5

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Calculating bond energies - Higher

This quiz will assess you on your knowledge from this lesson and previous lessons

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is the minimum amount of energy needed to start a reaction called?

1/5

Q2.What is the unit for bond energy values?

2/5

Q3.If the overall energy change is negative, what type of reaction is it?

3/5

Q4.During a reaction, 2462 kJ/mol of energy is needed to break bonds and 1363 kJ/mol of energy is released when bonds are made. What type of reaction is it?

4/5

Q5.During a reaction 988 kJ/mol of energy is needed to break bonds and 1892 kJ/mol of energy is released when bond are made. What type of reaction is it?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Calculating bond energies - Higher

This quiz will assess you on your knowledge from this lesson and previous lessons

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is the minimum amount of energy needed to start a reaction called?

1/5

Q2.What is the unit for bond energy values?

2/5

Q3.If the overall energy change is negative, what type of reaction is it?

3/5

Q4.During a reaction, 2462 kJ/mol of energy is needed to break bonds and 1363 kJ/mol of energy is released when bonds are made. What type of reaction is it?

4/5

Q5.During a reaction 988 kJ/mol of energy is needed to break bonds and 1892 kJ/mol of energy is released when bond are made. What type of reaction is it?

5/5

Lesson summary: Calculating bond energies

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