The correct option for free expansion of an ideal gas under adiabatic condition is:
(1) q = 0, $\Delta$T = 0 and w = 0
(2) q = 0, $\Delta$T < 0 and w > 0
(3) q < 0, $\Delta$T = 0 and w = 0
(4) q > 0, $\Delta$T > 0 and w > 0
(1) q = 0, $\Delta$T = 0 and w = 0
(2) q = 0, $\Delta$T < 0 and w > 0
(3) q < 0, $\Delta$T = 0 and w = 0
(4) q > 0, $\Delta$T > 0 and w > 0