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  4. The correct option for free expansion of an ideal gas under adiabatic condition is :

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Q. The correct option for free expansion of an ideal gas under adiabatic condition is :

NEETNEET 2020Thermodynamics

Solution:

For free expansion of ideal gas $P _{ e x t }= 0$
$W _{ p v }= 0$
$q = 0$ (adiabatic process)
$\Delta E = q + w$
$\Delta E = 0$
$\Delta E = n C _{ v m } \Delta T = 0$
$q = 0 , \Delta \mathbf { T } = 0 , w = 0$