When sudden expansion of gases takes place, cooling occurs. This is called _.
Correct answer: B. Joule Thomson effect
- A. Freezing effect
- B. Joule Thomson effect
- C. Boyle's effect
- D. J.Perrin effect
Explanation
Answer: B Joule Thomson effect is the phenomenon accompanying a change in temperature due to a rapid change in the volume of a gas (rapid expansion or rapid compression).
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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