Consider a steady state device in which a stream of ammonia enters at 100 kpa, 50◦c, at a rate of 1 kg/s. two streams exit the device at equal mass flow rates: one at 200 kpa, 50◦c, and the other is saturated liquid at 10◦c. it is claimed that the device operates in a room at 25◦c with an electric power input of 250 kw. is this possible

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.

Precipitation hardening can be achieved in many light alloys by a three-step heat treatment. what is carried out and what is the purpose at each step? why is such a treatment necessary based on the nucleation and growth theory of phase transformation. compare this treatment with tempering martensite for carbon steels (similarities and differences).