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What is the absolute entropy of a mixture of 0.5 mol of N2O(g) and 0.5 mol...

What is the absolute entropy of a mixture of 0.5 mol of N2O(g) and 0.5 mol of NO(g) at 298 K?

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Answer #1

Upon removal of the dividing partition, they expand into a final common volume (the sum of the two initial volumes), and the entropy of mixing is given by

.

where is the gas constant, the total number of moles and the mole fraction of component ,

absolute entropy = -1*R * (0.5ln0.5+0.5ln0.5) = 0.693R=5.76 J/g.K

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