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Properties of Matter

Properties of Matter. Specific Heat. Specific Heat. Couple of Terms: Heat may be defined as energy in transit from a high temperature object to a lower temperature object. Specific Heat. Couple of Terms

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Properties of Matter

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  1. Properties of Matter Specific Heat

  2. Specific Heat • Couple of Terms: • Heatmay be defined as energy in transit from a high temperature object to a lower temperature object.

  3. Specific Heat • Couple of Terms • Temperature is a measure of the average kinetic energy associated with the disordered microscopic motion of atoms and molecules.

  4. Specific Heat • Couple of Terms: • A calorie is a unit of measurement for energy.

  5. Specific Heat • The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

  6. Specific Heat • The relationship between heat and temperature change is usually expressed as: • Q = cmDT • where c is the specific heat m is the mass DT is the change in temperature and Q is the heat added

  7. Specific Heat • This relationship does not apply if a phase change is encountered, because the heat added or removed during a phase change does not change the temperature.

  8. Specific Heat • The specific heat of water is 1 calorie/g °C

  9. Specific Heat • Now a Lab!

  10. Heat of Fusion • The energy required to change a gram of a substance from the solid to the liquid state without changing its temperature. • For Ice to water it’s 80 cal/g

  11. Heat of Vaporization • The energy required to change a gram of a liquid into the gaseous state at the boiling point. • For water to steam it’s 540cal/g

  12. Specific Heat • Calculations…… • The specific heat of water is 1 c/g • The specific heat of Steam is 0.48 c/g • The specific heat of Ice is 0.50 c/g

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