Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
$\mathrm{q}=0, \Delta \mathrm{T}=0, \mathrm{w}=0$
$\mathrm{q}=0, \Delta \mathrm{T} \neq 0, \mathrm{w}=0$
$\mathrm{q} \neq 0, \Delta \mathrm{T}=0, \mathrm{w}=0$
$\mathrm{q}=0, \Delta \mathrm{T}<0, \mathrm{w} \neq 0$
