A litre of dry air STP expands adiabatically to a volume of 3 L. If ${\rm{\gamma }} = 1.40,$ the work done by air is ${\rm{(}}{{\rm{3}}^{{\rm{1}}{\rm{.4}}}}{\rm{ = 4}}{\rm{.6555)}}$ [Take, air to be an ideal gas]

NEET UG PHYSICS MCQ: THERMODYNAMICS

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A litre of dry air STP expands adiabatically to a volume of 3 L. If

\mathrm{\gamma } = 1.40,

the work done by air is

\mathrm{(}{\mathrm{3}^{\mathrm{1}\mathrm{.4}}}\mathrm{ = 4}\mathrm{.6555)}

[Take, air to be an ideal gas]

View answer and explanation

Correct option: B

90.5 J

Option B (90.5 J) is correct because the work done by the air is calculated using the adiabatic process equation and the ideal gas law.