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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

Chapter 13

States of Matter:

Changes of State

objectives
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
slide7
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?

states of matter plasma
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
states of matter
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

phase diagrams
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.
phase diagram of h 2 o
Phase Diagram of H2O

Water

<---Melting

Freezing--->

<---Condensation

Vaporization --->

Ice

Triple Point

Water Vapor

<---Deposition

Sublimation--->

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