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States of Matter — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStates of Matter2 Marks
Question
Define inversion temperature of a gas.
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Answer

Inversion temperature is a temperature below which if a gas is allowed to expand, it causes cooling effect.
$\text{T}_\text{i}=\frac{2\text{a}}{\text{bR}}$

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