Chapter 13 States of Matter 13.2 The Nature of Liquids 13.1 The Nature of Gases 13.2 The Nature of Liquids 13.3 The Nature of Solids 13.4 Changes of State Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

melting point - temperature at which a solid changes into a liquid. A Model for Solids melting point - temperature at which a solid changes into a liquid. freezing point - temperature at which a liquid changes into a solid. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

A Model for Solids sublimation - change of a substance from a solid to a vapor, without passing through the liquid phase. deposition - change of a substance from a vapor to a solid without passing through the liquid state.. Solid Vapor (gas) sublimation deposition Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Sublimation Solid carbon dioxide (dry ice) is often used as a coolant for goods such as ice cream, which must remain frozen during shipment. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Phase Diagrams phase diagram: graph showing conditions at which a substance exists as a solid, liquid, or vapor Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Phase Diagrams  A phase diagram summarizes the effect of temperature and pressure on a substance in a closed container.  The conditions of pressure and temperature at which two phases exist in equilibrium are indicated on the phase diagram by a line separating the phases. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Phase Diagrams triple point - set of conditions at which all three phases can exist in equilibrium with one another. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

Do Now The water cycle is the process by which water moves from place to place above, on and below the Earth’s surface. Work with your group to develop a list of phase changes associated with the water cycle. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

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Plasma http://ed.ted.com/lessons/solid-liquid-gas-and-plasma-michael-murillo Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

END OF 13.4 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.