Thermometer/ reproducible thermal phenomena

[Any Help]

What are reproducible thermal phenomena that are used to calibrate thermometers?

 

[Bystander]

I "smell" homework. What sorts of phenomena do you think would be useful?

 

[Any Help]

What sorts of phenomena do you think would be useful?

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.

 

[Bystander]

What phase changes are not pressure sensitive? Are you familiar with "the phase rule?"

 

[Any Help]

What phase changes are not pressure sensitive? Are you familiar with "the phase rule?"

I don't know. I'm lost now. Then they mean by reproducible phenomena phases like steam point and melting point?

 

[Bystander]

https://www.physicsforums.com/threads/is-the-definition-of-a-phase-arbitrary.891651/#post-5609568
Follow along here, if you will, and things will become clear as mud.

 

[Any Help]

https://www.physicsforums.com/threads/is-the-definition-of-a-phase-arbitrary.891651/#post-5609568
Follow along here, if you will, and things will become clear as mud.

okay thanks a lot

 

[lychette]

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.

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