During the isothermal mixing of ideal gases at pressure, p, the entropy change per mole for the mixing process is-R  where x1, x2,....,xi are the mole fractions of the components, 1, 2,....,i of the mixture. Assuming ideal gas behavior, calculate $∆S$ for the mixing of 0.8 mole of N2 and 0.2 mole of O2.(at ${25}^{\circ }C$ and 0.9 atm) [1 eu = cal/deg]

1. 0.9943 eu

2. 0.7533 eu

3. 0.6798 eu

4. 0.7112 eu

Concept Videos :-

#27 | Entropy Change Estimation
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Concept Questions :-

Spontaneity and Entropy
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