Question

10 moles of an ideal gas expands adiabatically reversibly from 5$d{m}^3$ to 10$d{m}^3$ at 300 K. Find the entropy change.

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Answer 1

Do you think it is a tricky question?
Just recall $Q_{rev}$
Here, $Q_{rev}$ = 0 [Because it is an adiabatic process]
Therefore, $\Delta S=\frac{Q_{rev}}{T}$
= 0