Temperature

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Temperature

  1. 1. GROUP 1 PowerPuffGirlz/Bo yz Application of temperature in the industry Defiinition and Conversion of Temperature Measuring Temperature Absolute Temperature Zeroth Law
  2. 2. TEMPERATU RE
  3. 3. Definition
  4. 4. Property
  5. 5. For example, a lightening bolt can heat a small portion of the atmosphere hotter than the surface of the sun
  6. 6. Tools it is measured by a thermometer, which may be calibrated in any of various temperature scales, Celsius, Fahrenheit, Kelvi n, Rankine, etc.
  7. 7. Thermometers Thermocouple Pyrometer Liquid Crystal Thermometer Beckman
  8. 8. Deriving the Celsius-to-Fahrenheit Conversion Formula
  9. 9. CONVERSION B/W DIFFERENT TEMPERATURE SCALES 1.Determine change in T from the ice point of the given reading from its scale. 2. Convert answer in step 1 using the conversion factor of the scales. 3. Add or subtract the answer in Step 3 from the ice point of the new scale.
  10. 10. Example 2 The ice point and boiling point of ⁰A are -30.0 ⁰A and +60.0 ⁰A respectively. On the other hand ⁰B has +20.0 ⁰B and +130.0 ⁰B respectively. a). Using the data, determine the number of B degrees on the B scale that corresponds to 1 ⁰A on the A scale. b). If the temperature of a substance reads +40 ⁰A on the a scale, what would the temperature read on the B scale?
  11. 11. Problems
  12. 12. PROBLEM 1 A pan of water is heated from 25C to 80C. What is the change in its temperature on the Kelvin Scale and on the Fahrenheit scale?
  13. 13. A time and temperature sign on a back indicates that the outdoor temperature is - 20C. Find the corresponding temperature in the Fahrenheit scale. PROBLEM 2
  14. 14. During a heating process, the temperature of a system rises by 10C express the rise in temperature in Kelvin and Fahrenheit. PROBLEM 3
  15. 15. You place a small piece of melting ice in your mouth eventually the water converts from ice at T1=32F to body temperature T2=98.6F. Express these temperatures as Celcius and Kelvin, and find change in T in both cases. PROBLEM 4
  16. 16. ABSOLUTE ZERO
  17. 17. Definition Absolute zero is the coldest possible temperature. It is the temperature at which entropy reaches its minimum value.
  18. 18. 0K Kelvin 0 R Rankine −273.15° Celsius −459.67° Fahrenheit Absolute Zero Standards
  19. 19. Scientists have achieved temperatures extremely close to absolute zero, where matter exhibits quantum effects such as superconductivity and superfluidity
  20. 20. ZEROTH LAW
  21. 21. It deals with the concept of thermal equilibrium. Definition
  22. 22. Two systems are said to be in thermal equilibrium if there is no net flow of heat between them when they are brought into thermal contact.
  23. 23. Then, temperature is the indicator of thermal equilibrium in the sense that there is no net flow of heat between two systems in thermal contact that have the same temperature.
  24. 24. END
  25. 25. References • -wikipedia.org • College Physics 6th Edition, Cutnell and Johnson, Wiley Publishing • Thermodynamics 1, Hipolyto Sta. Maria,

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