Ch. 1 - Matter I. States of Matter »Kinetic Molecular Theory »States of Matter.
States of matter
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Transcript of States of matter
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7SCIENCE Thurs. April 7
States of Matter
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Review: Kinetic Theory of Matter
• What is the kinetic theory of matter?– All particles in matter are in
constant, random motion
• What determines state of matter (solid, liquid or gas) ?– Arrangement – Movement (motion) of atoms
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Kinetic Theory of Matter• These energy produced by these moving particles is
called kinetic energy
• The higher the temperature, the faster the particles are moving and more likely they will collide into other particles
• When particles collide, the faster-moving particles (hotter) transfer some energy to the slower-moving particles (cooler)
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States of Matter: SOLID
• The lower the temperature, the slower the particles are moving (less energy)
• Solids: The particles have little motion, and are shaking in a specific arrangement/shape
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States of Matter: Melting/Freezing Points
• If temperature ↑, the particles will shake faster and at a certain temperature they will break free of their shape
• This temperature is called the melting point solid liquid
• When the opposite happens (liquid solid) this temperature is called the freezing point
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States of Matter: LIQUID
• In a liquid the particles are free to move and take the shape of its container
Ex. Pour a glass of water:• Forces hold the particles
together as a liquid while gravity holds them at the bottom of the glass
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State of Matter: GAS
• If temperature in the liquid increases, the particles begin to shake faster and escape the arrangement and forces of the liquid
• This temperature is called the boiling point and is called vaporization
• Particles are free to move around inany direction or shape