helpFlash separator is a common unit operation system in chemical engineering. This technique

utilizes the sudden drop in pressure of a stream at vapor$-$liquid equilibrium to separate vapor

and liquid. In an application, Refrigerant $134$ a with quality $65\%$ at $10$ bar, enters a flash vessel

at a rate of $490k\frac{g}{h}.$ Due to the sudden drop in the vessel, partial vaporization occurs, and

separation of vapor and liquid is achieved. Hence, two outlet streams emerge from the vessel.

The first outlet stream contains saturated vapor while the other outlet stream contains

saturated liquid. Both outlet streams are at $4$ bar.

a$.$ Sketch the flash vessel described above. Label all the streams associated with the

system

b$.$ By making appropriate assumptions, calculate:

i$.$ The mass flowrate $(k\frac{g}{s})$ of liquid stream.

ii$.$ The mass flow rate $(k\frac{g}{s})$ of vapor stream.