Changes of StateChapter 7 Lesson 3Mr. BreedenWhat Happens When Heat is Added or Removed From a Substance?If enough heat is added or taken away, a physical change can occurA change of state doesnt change the substance itself, only changes its physical properties. Chemically, its still the same

What Happens When Heat is Added or Removed From a Substance?Add Heat = Solid Liquid Gas

Remove Heat = Gas Liquid Solid

Thermal EnergyThermal Energy- is the TOTAL amount of Kinetic & Potential Energy of the particles in an object

HeatHeat- is the transfer of thermal energyHeat travels one direction, from warm objects to cooler objects

Changes of StateMeltingMelting is when a Solid changes to a LiquidThe solid absorbs enough energy to make the particles loosen their bonds with each otherThe particles are vibrate faster and faster as more energy is absorbed

The melting point of pure H2O is what?

Changes of StateFreezingFreezing is the opposite of meltingFreezing is when a Liquid loses enough energy to become a solidEnergy is removed, the particles vibrate slower until they eventually vibrate in place

Whats the Freezing point of pure H2O? What unique about H2O when it freezes? AssignmentPg. 272 My Planet DiaryFigure 1, 2Assess Your UnderstandingFigure 3Assess Your Understanding

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