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Specific heat capacity ppt

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Specific heat capacity ppt

1. 1. Specific HeatCapacity
2. 2. Temperature vs. Heat• Temperature is themeasurement of the avg. KEof the particles in matter.• Heat energy that flowsfrom a warmer object to acooler object.
3. 3. 4A. When you touch ice, heat is transferredfrom1) your hand to the ice2) the ice to your handB. When you drink a hot cup of coffee, heatis transferred from1) your mouth to the coffee2) the coffee to your mouthLearning Check
4. 4. Have you ever noticed that on ahot summer day the pool iscooler than the hot cement?OR maybe that the ocean iscooler than the hot sand?
5. 5. Specific Heat Capacity1 calorie = 4.184 J1,000 J = 1 KJ4,184 J = 1 Kcal = 1 CalorieSpecific Heat: The amount of heat required toraise the temperature of 1 gram of a substance1 degree Celsius.
6. 6. Substance SpecificHeatJ/(g°C)Water 4.184Ethanol 2.44Aluminum 0.897Granite 0.803Iron 0.449
7. 7. LecturePLUS Timberlake 99 10Learning CheckA. A substance with a large specific heat1) heats up quickly 2) heats up slowlyB. When ocean water cools, the surrounding air1) cools 2) warms 3) stays the sameC. Sand in the desert is hot in the day, and coolat night. Sand must have a1) high specific heat 2) low specific heat
8. 8. Equation:q = c x m x ΔTΔT = Tfinal – Tinitialq = the heat absorbed or releasedc = the specific heat of the substancem = the mass of the sample in gramsΔT = change in temperature
9. 9. 1.) Copper metal has a specific heat (Cp) of0.385 J/g⁰C. Calculate the amount of heat (J)required to raise the temperature of 22.8 g ofcopper from 20.0⁰C to 875⁰C.
10. 10. 2) What is the specific heat of a 25.0 gsubstance that absorbs 493.4 J,and raises the temperature from 12.0⁰C to34⁰C?
11. 11. 3) It takes 1,250 J of energy to heat a certainsample of pure silver from 12.0 0C to 15.2 0C.Calculate the mass of the sample of silver.