Africtionless vertical piston-cylinder device contains 3 kg of h2o initially at t1 = 180◦c and p1 = 50 bar. the device is heated until the temperature is t2 = 400◦c. assume a quasiequillibrium process which occurs slowly with no acceleration as the piston moves. kinetic and potential energy effects are negligible. determine: a. work [kj] during process (indicate magnitude and direction) b. heat transfer [kj] during process (indicate magnitude and direction)