A frictionless vertical piston-cylinder device contains 0.8 lbm of H 2 0, initially at T 1 = 450? F and p 1 = 150 psia. The device is cooled which causes the piston to descend, slowly with no acceleration, until it hits the stops at which point the volume of the water is 0.6 ft^3 . Cooling continues until the temperature is T 2 = 200? F (final state is state 2). Assume a quasiequillibrium process with negligible kinetic and potential energy effects. a. work [Btu] during process (indicate magnitude and direction) b. heat transfer [Btu] during process (indicate magnitude and direction)