Asked by karthika
in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?
Answers
Answered by
drwls
Because the inversion temperature is lower than room temperature for hydrogen (and helium) , so that the J-T coefficient is negstive at room temperture. See
http://en.wikipedia.org/wiki/Joule%E2%80%93Thomson_effect#The_Joule.E2.80.93Thomson_.28Kelvin.29_coefficient
It seems to be a characteristic of gases that are very hard to liquify.
http://en.wikipedia.org/wiki/Joule%E2%80%93Thomson_effect#The_Joule.E2.80.93Thomson_.28Kelvin.29_coefficient
It seems to be a characteristic of gases that are very hard to liquify.
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