When the 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. Boyles effect
- D. J Perrin effect
Explanation
Joule-Thomson effect, also called Joule-Kelvin effect, the change in temperature that accompanies expansion of a gas without production of work or transfer of heat.OPTION A: Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.OPTION B: Joule-Thomson effect, also called Joule-Kelvin effect, the change in temperature that accompanies expansion of a gas without production of work or transfer of heatOPTION C: Boyle's effect states that If volume increases, then pressure decreases and vice versa, when the temperature is held constant.OPTION D: J perrin has no work of effects but he is known especially for his discovery of sedimentation equilibrium.
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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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