ThermodynamicsMedium
Question
One mole of an ideal monoatomic gas undergoes adiabatic free expansion from 2 to 20 dm3, 300 K. The value of ΔS for the gas is
Options
A.0
B.+R ln10
C.−R ln10
D.+1.5 R ln10
Solution
$\Delta S = nR\ln\frac{V_{2}}{V_{1}} = 1 \times R \times \ln\frac{20}{2} = R.\ln 10$
(Adiabatic free expansion is also isothermal)
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