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Entropy and Internal Energy in irreversible adiabatic process

For an ideal gas undergoing an adiabatic free expansion, a simple example of an irreversible adiabatic process, no work is done, so $$q=w=0$$ implying $$\Delta U = w+q = 0$$ and it follows (since the ...
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Why does entropy increase on mixing two ideal liquids?

If we have $1$ mol each of two different types of ideal gases ($\ce{He}$ and $\ce{Ne}$ for example) at the same pressure and in two equal volumes separated by a partition if you remove the partition ...
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Why does entropy increase on mixing two ideal liquids?

Entropy is a measure of the number of ways (configurations) in which a system (the liquids before or after mixing) can be arranged subject to constraints such as the pressure and temperature. At the ...
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