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Specific Heat

Specific Heat. Pre – Lab. “Flying Freddie Spooner” 2013 Tri-Valley Cannonball Champion. Specific Heat. Different substances require different amounts of heat to change their temperature.

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Specific Heat

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  1. Specific Heat Pre – Lab

  2. “Flying Freddie Spooner” 2013 Tri-Valley Cannonball Champion

  3. Specific Heat • Different substances require different amounts of heat to change their temperature. • In general the specific heat of a substance indicates how hard something is to heat up or cool down. • Scientifically speaking the specific heat is the amount of heat required to change the temperature of 1 gram of a substance by 1ºC.

  4. Which substance is the hardest to heat up or cool down?

  5. Importance of Water’s High Specific Heat • Maintenance of Body Temperature

  6. Importance of Water’s High Specific Heat • Temperature fluctuations that permit life.

  7. Importance of Water’s High Specific Heat • Heat Storage on a Larger Scale.

  8. Today you will determine the specific heat of a metal.

  9. How can we determine experimentally the specific heat of this metal? Lead

  10. Look to the units. They will lead you to the answer.

  11. J/g °C We must determine three things to find the specific heat? Joules (Energy) Grams (mass) °C (temperature change)

  12. What measurements of this metal are needed to find it’s specific heat? Lead

  13. H = mΔTCp

  14. Today you will use the high specific heat capacity of water to help us determine the specific heat of a metal. • How will we do this?

  15. . 100.0°C

  16. . 100.0°C

  17. 100.0°C

  18. How Do We Use the Measurements Below to Determine the Specific Heat of the Metal? 100.0°C

  19. H = mΔTCp H Metal’s p 100.0°C

  20. 100.0°C What does this answer represent? Hwater = mΔTCp = (50.00g)(6.8°C)(4.184 J/g C) = 1422.56J = 1400J

  21. 100.0°C Hwater = Hmetal = 1400J We can now find the Cp of the metal

  22. 100.0°C

  23. Calculate the “Percent Error”of our specific heat measurement.

  24. Percentage Error

  25. You will experimentally determine the specific heat of Aluminum 0.90

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