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Chapter 4 Lesson 2 Changes of State
What happens to the particles of a solid as it melts? What happens to the particles of a liquid as it vaporizes? What happens to the particles of a solid as it sublimes?
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What is Thermal Energy? Thermal energy is the total energy of the motion of all of the particles in an object Thermal energy naturally flows from warmer matter to cooler matter Page 110 in your book
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What happens to the particles of a solid as it melts?
Thermal energy More Thermal energy Most Thermal energy
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Free to move Fixed position
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What happens to the particles of a solid as it melts?
Melting Point Freezing Point Solid to Liquid Particles in solid absorb energy, start to vibrate Faster, Faster, Faster Break apart! Liquid to Solid Particles lose energy, start to slow down Slower, Slower, S l o w e r Stuck together
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What happens to the particles of a liquid as it vaporizes?
Liquid to a Gas Vaporization particles gain energy Start moving fast
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What happens to the particles of a liquid as it vaporizes?
Boiling Evaporation Both below and on the surface Boiling points Only takes place on surface
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Types of Vaporization Liquid water changes to water vapor by either evaporation or boiling. What are the types of vaporization occurring in each flask?
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What happens to the particles of a liquid as it vaporizes? (Reverse!)
Condensation Gas to a liquid Gas particles lose energy and slow down, resulting in a liquid Clouds are Liquid!
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What happens to the particles of a solid as it sublimes?
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Sublimation Solid’s surface particles gain LOTS of energy
Turn straight into a gas Skips liquid state
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