4–75 A 1-m3 tank containing air at 10°C and 350 kPa is
connected through a valve to another tank containing 3 kg
of air at 35°C and 200 kPa. Now the valve is opened, and
the entire system is allowed to reach thermal equilibrium
with the surroundings, which are at 20°C. Determine the volume of the second tank and the final equilibrium pressure of
air

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.