A400 liter tank, (labeled a), contains argon gas at 250kpaand
30 degreesc. a cylinder(labeled b), is connected to tank(a) with a
pipe that has a valve that is closed. cylinder b, having a
frictionless piston of such mass that apressure of 150kpa will
float it, is initially empty. the valve isopened and argon flows
into cylinder b and eventually reaches auniform state of 150kpa and
30 degreesc throughout. what is thework done by the argon?

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.