Endothermic and Exothermic Reactions

Endothermic and Exothermic Reactions

Assessment

Interactive Video

Chemistry, Physics, Science

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial introduces unit five on energetics and thermochemistry, focusing on exothermic and endothermic reactions. It explains exothermic reactions, where heat exits the system, using examples like combustion. The tutorial covers thermal equations and energy diagrams, illustrating enthalpy changes and stability. It then discusses endothermic reactions, where energy is absorbed, using the melting of ice as an example. The video concludes with a summary of the differences between exothermic and endothermic reactions and hints at future content on measuring enthalpy changes.

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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?

Heat is absorbed from the surroundings.

Heat is released to the surroundings.

The reaction requires light to proceed.

The reaction occurs only at high temperatures.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Photosynthesis

Evaporation of water

Combustion of natural gas

Melting of ice

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an exothermic reaction, what happens to the enthalpy of the system?

It remains constant.

It becomes zero.

It decreases.

It increases.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a negative delta H indicate in a chemical reaction?

The reaction is non-spontaneous.

The reaction is at equilibrium.

The reaction is exothermic.

The reaction is endothermic.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is heat represented in a thermal equation for an exothermic reaction?

As a solvent

As a reactant

As a catalyst

As a product

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main characteristic of an endothermic reaction?

The reaction requires a catalyst.

Heat is absorbed from the surroundings.

The reaction occurs only in the dark.

Heat is released to the surroundings.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following processes is endothermic?

Condensation of steam

Freezing of water

Combustion of wood

Melting of ice

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