Energy Transformations in Exothermic and Endothermic Reactions

Energy Transformations in Exothermic and Endothermic Reactions

Assessment

Interactive Video

Chemistry, Physics, Science

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial from freesciencelessons.co.uk covers the concepts of exothermic and endothermic reactions. It explains how exothermic reactions release energy to the surroundings, increasing the temperature, with examples like combustion and oxidation. Endothermic reactions, on the other hand, absorb energy, decreasing the temperature, with thermal decomposition as an example. The video also discusses energy profile diagrams and the concept of activation energy, which is the minimum energy required for particles to react. Practical applications of these reactions, such as in hand warmers and self-heating cans, are also highlighted.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main characteristic of an exothermic reaction?

It does not involve any energy change.

It releases energy to the surroundings.

It only occurs at high temperatures.

It absorbs energy from the surroundings.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of an exothermic reaction?

Evaporation

Melting ice

Combustion

Photosynthesis

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an exothermic reaction energy profile, how do the energy levels of products compare to reactants?

Products and reactants have the same energy.

Products have less energy than reactants.

Products have more energy than reactants.

Energy levels are not shown in the profile.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a common use of exothermic reactions?

Refrigerators

Hand warmers

Cooling packs

Air conditioners

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the temperature of the surroundings during an endothermic reaction?

It increases.

It fluctuates randomly.

It decreases.

It remains constant.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of an endothermic reaction?

Neutralization

Combustion

Thermal decomposition

Oxidation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an endothermic reaction energy profile, how do the energy levels of products compare to reactants?

Products and reactants have the same energy.

Energy levels are not shown in the profile.

Products have more energy than reactants.

Products have less energy than reactants.

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