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Pressure Law

Pressure Law. Procedure:. 1. Air trapped in a flask is heated in a water bath. 2. Use the thermometer and Bourdon gauge to measure the temperature and the pressure of the air. 3. Take about several readings with different temperature. Result. Graph Plotting. Pressure / kPa. 130. 120.

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Pressure Law

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  1. Pressure Law

  2. Procedure: • 1. Air trapped in a flask is heated in a water bath. • 2. Use the thermometer and Bourdon gauge to measure the temperature and the pressure of the air. • 3. Take about several readings with different temperature.

  3. Result

  4. Graph Plotting Pressure / kPa 130 120 110 100 90 Temp. / C 20 40 60 80 100

  5. Pressure - Temperature What is this relation?

  6. Result • The graph of pressure against temperature is a straight line. • Is Pressure directly proportional to Temp.? Pressure Temperature

  7. Pressure • Is P directly proportional to T? Temperature / C 0 P = T + constant (y-intercept)

  8. Pressure • Is P directly proportional to T? Temperature 0

  9. Pressure • Is P directly proportional to T? Temperature 0

  10. Pressure • Is P directly proportional to T? Temperature 0

  11. Pressure • Is P directly proportional to T? Temperature 0 -273C

  12. Pressure • Is P directly proportional to T? Temperature 0 -273C

  13. Pressure • Is P directly proportional to T? Temperature 0 -273C 0 K 273K • P is directly proportional to T!

  14. Kelvin Scale Pressure • Is P directly proportional to T? • K = 273 + C Temperature 0 K 273K • P is directly proportional to T!

  15. Result

  16. Result

  17. Graph Plotting

  18. Conclusion P  T P/T = constant P1 /T1 = P2/T2 Pressure Law Pressure of a fixed mass of gas at constant volume is directly proportional to its Kelvin temperature.

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