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Solids, Liquids and Phase Changes (chapter 12)

Solids, Liquids and Phase Changes (chapter 12)

Author: carolyn fruin

I know I have mastered the learning targets when I know

  • why a liquid is a liquid and not a gas or solid.
  • if one molecule of water can boil.
  • why boiling water never reaches a temperature higher than 100 degrees Celsius at sea level but the vaporized water can.


Learning Targets:

  • I can describe the different states of matter and explain their differing properties using the Kinetic Molecular Theory.
  • I understand the transitions from one state to another in terms of energy absorbed/released.
  • I understand the different sections on a heating curve and know when a phase change is occuring.
  • I can calculate the energy given off/absorbed as water is heated/cooled.


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Video Questions

The following videos are short and informative, some even entertaining. View all of them and afterward, see if you are able to easily answer these questions. Be sure to ask questions in class if you are not sure you clearly understand the topic.

  1. Compare and contrast the properties of solids, liquids and gases. What specifically distinguishes one from the other?
  2. Describe why a balloon expands when you blow into it.
  3. Why don't we "feel" air pressure?
  4. What would happen to an astronaut in space without a spacesuit? Why?
  5. Explain why the cardboard did not fall to the ground when the glass of water was tipped upside down.
  6. How does volume or temperature affect gas pressure?
  7. What happens to water at a molecular level when it freezes? Is this typical of all matter?
  8. What are intermolecular forces?
  9. How do they affect the states of matter of a substance?


States of Matter - Solid

This series of videos describes the different states of matter including what happens at the molecular level in each phase.

Source: Eureka! television series

States of Matter - Liquid

This series of videos describes the different states of matter including what happens at the molecular level in each phase.

States of Matter - Changes of State

This video summarizes how what happens as matter changes from one state to another. Pay careful attention to KMT.

PhET Lab Simulation - States of Matter

Take some time to play with the PhET States of Matter Simulation to learn about how changes of state occur. It may take a few moments to load. When the simulation starts, click on the phase change tab at the top of the screen to be able to adjust for several variables at once.

Expansion and Contraction

This video illustrates how KMT explains the expansion and contraction of materials as temperatures change.

Source: Eureka! television series

Solids, Liquids and Phase Changes

View the power point as a guide while you read the chapter.

Introduction to the Heating Curve

This video describes the sections of a heating curve and describes what happens during steps as a substance is heated.

Source: KhanAcademy

Phase Changes, Energy and Heating Curves

This video explains the sections of a heating curve. It includes a sample problem of calculating the energy needed to bring a sample of ice at -10 degrees Celsius to a boil.

Source: KhanAcademy

Optional Study Guide - Chapter 12

This worksheet is from the resource materials tied to Chapter 12 in your textbook. If you would like extra practice, feel free to review using this optional assignment.


Source: adapted from Holt: Modern Chemistry

CHECKPOINT - Chapter 12

Complete the following assignment as a review of the materials you should have learned as you read/viewed the chapter materials above.