Are you talking about how to calculate quality, i.e. the percentage and the volume of liquid and vapor? Try the video below. If that is still not what you are looking for, you can type in your problem with the description and I will see what you are looking for. th-cam.com/video/PqhjP2m6msc/w-d-xo.html
where did the number 320 pKa come from in the first problem?
320 kPa is a known from the problem description. The problem gives the temperature at -12 degree and pressure at 320 kPa.
How can I calculate liquid volume in a mixture using a Equation of state? I really appreciate if you upload a video
Are you talking about how to calculate quality, i.e. the percentage and the volume of liquid and vapor? Try the video below. If that is still not what you are looking for, you can type in your problem with the description and I will see what you are looking for.
th-cam.com/video/PqhjP2m6msc/w-d-xo.html
Why my book said that vg for 550kPa is 0.037452
The numbers are sllightly different bewteen books. I would consider 0.037452 and 0.037408 smilar and both correct.