In the mixing of two ideal gases at the same temperature, the entropy of mixing is not zero because

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enthalpy of mixing is not zero

there occurs increase in temperature

there occurs increase in disorderliness or entropy of both the gases

there occurs decrease in temperature

answer is A.

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Detailed Solution

In the mixing of two gases, disorderliness or entrorpy of both the gases increases. thus, In the mixing of two ideal gases at the same temperature, the entropy of mixing is not zero because there occurs increase in disorderliness or entropy of both the gases.

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