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Thermometer/ reproducible thermal phenomena

  1. Oct 31, 2016 #1
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    What are reproducible thermal phenomena that are used to calibrate thermometers?
     
  2. jcsd
  3. Oct 31, 2016 #2

    Bystander

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    I "smell" homework. What sorts of phenomena do you think would be useful?
     
  4. Oct 31, 2016 #3
    I don't know, they said in the slides that to calibrate a thermometer we should place it in reproducible thermal phenomena.
    So what are those reproducible phenomena? do they mean boiling and melting point of water?
    if they mean boiling and melting of water, as we know water is pressure sensitive so its not reliable from place to place? so how to calibrate thermometer with that? it won't be precise.
     
  5. Oct 31, 2016 #4

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    What phase changes are not pressure sensitive? Are you familiar with "the phase rule?"
     
  6. Nov 1, 2016 #5
    I don't know. I'm lost now. Then they mean by reproducible phenomena phases like steam point and melting point????
     
  7. Nov 1, 2016 #6

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  8. Nov 1, 2016 #7
  9. Nov 1, 2016 #8
    The boiling point and freezing point of water are basic 'fixed points' in defining the Celsius temp scale. You are correct to state that these depend on pressure so the pressure must also be specified
     
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