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Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.?

LohaHridoy
  1. Below
  2. At
  3. Above
  4. Either B or C

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Answer: Option 1

Above the inversion temperature joule-thomson coefficient $${\left( {\frac{{\partial T}}{{\partial P}}} \right)_H} = - ve$$ So, by throttling (decreasing the pressure) the temperature increases and hence heating. Below the inversion temperature houle-thomson coefficient $${\left( {\frac{{\partial T}}{{\partial P}}} \right)_H} = + ve$$ So,by throttling the temperature decreases hence cooling.

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