# One mole of ${\mathrm{H}}_{2}$ is mixed with one mole of ${\mathrm{O}}_{2}$ at constant temperature and pressure. The entropy change of the system

1. A

would be zero

2. B

would be positive

3. C

would be negative

4. D

cannot be predicted

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### Solution:

Here, one mole of ${\mathrm{H}}_{2}$ is mixed with one mole of ${\mathrm{O}}_{2}$ at constant temperature and pressure.

In this process entropy change of the system would be positive.

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