Two molar of \( \mathrm{He} \) gas \( (\gamma=5 / 3) \) is initially at temp \( 27^{\circ} \math...

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Two molar of \( \mathrm{He} \) gas \( (\gamma=5 / 3) \) is initially at temp \( 27^{\circ} \mathrm{C} \) and occupy a volume of 20 litres. The gas is first expanded at constant pressure until its volume is doubled, then it undergoes a reversible adiabatic change, until the volume become 110 lit, then predict the value of \( \mathrm{T} / 100 \) (where \( \mathrm{T} \) is the final temperature, \( \left(\frac{4}{11}\right)^{2 / 3}=\frac{1}{2} \) )
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