One mole of an ideal gas expands adiabatically and reversibly from its initial pressure to half of its initial pressure. What will be the value of $\Delta S$ in $J \ K^{-1} \ mol^{-1}$? $[ln 2 = 0.693$ and $R = 8.314 \ J \ mol^{-1} \ K^{-1}]$
- A$10.76$
- B$6.76$
- C$0$
- D$5.76$
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