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This tag is for questions relating to "gas", one of the four fundamental states of matter (the others being solid, liquid, and plasma). Gases follow certain laws known as the gas laws. These laws tell us about the behavior of gases i.e., the values and relations of temperature, pressure and volume etc.

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Why is the excluded volume 4 times the volume of the gas molecule in van der Waal's Volume C...

Consider one mole of gas composed of non-interacting point particles that satisfy the ideal gas law: $$p=\frac{RT}{V_{m}}=\frac{RT}{v} $$ Next assume that all particles are hard spheres of the same finite …
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