One mole of helium at (100^{circ} mathrm{C}) is mixed with (0.5 mathrm{~mol}) of neon at (0^{circ} mathrm{C}).

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One mole of helium at \(100^{\circ} \mathrm{C}\) is mixed with \(0.5 \mathrm{~mol}\) of neon at \(0^{\circ} \mathrm{C}\). Calculate \(\Delta S_{\text {mix }}\) for this mixture if the mixing is isobaric \((P=1 \mathrm{~atm})\) and the gases are ideal. We are given that \(C_{P, \mathrm{He}}=C_{P, \mathrm{Ne}}=2.5 R\).

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