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Chapter 13

Chapter 13. States of Matter: Changes of State. Objectives. Changes of State (13.4 ) The six basic phase changes What is a plasma Be able to describe the parts of a heating and cooling curve Understand a phase diagram. PHASE CHANGES. PHASE CHANGES. The Six Basic Phase Changes.

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Chapter 13

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  1. Chapter 13 States of Matter: Changes of State

  2. Objectives • Changes of State (13.4) • The six basic phase changes • What is a plasma • Be able to describe the parts of a heating and cooling curve • Understand a phase diagram

  3. PHASE CHANGES

  4. PHASE CHANGES

  5. The Six Basic Phase Changes

  6. Phase Changes: Where Does the Heat Go?

  7. But what happens if you raise the temperature to super-high levels…between 1000°C and 1,000,000,000°C ? Will everything just be a gas?

  8. STATES OF MATTERPLASMA • A plasma is an ionized gas. • A plasma is a very good conductor of electricity and is affected by magnetic fields. • Plasmas, like gases have an indefinite shape and an indefinite volume. • Plasma is the • common state • of matter

  9. STATES OF MATTER LIQUID PLASMA SOLID GAS Tightly packed, in a regular pattern Vibrate, but do not move from place to place Close together with no regular arrangement. Vibrate, move about, and slide past each other Well separated with no regular arrangement. Vibrate and move freely at high speeds Has no definite volume or shape and is composed of electrical charged particles

  10. Heating/Cooling Curve

  11. Heating/Cooling Curve

  12. Phase Diagrams • Graph of pressure-temperature relationship: Show were each of the phases are • Lines indicate equilibrium state two phases. • Triple point- Temp. and Pressure where all three phases co-exist in equilibrium. • Critical temp.- Temp. where substance must always be gas, no matter what pressure. • Critical pressure- vapor pressure at critical temp. • Critical point- point where system is at its critical pressure and temp.

  13. Phase Diagram of H2O Water <---Melting Freezing---> <---Condensation Vaporization ---> Ice Triple Point Water Vapor <---Deposition Sublimation--->

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