Undergrad How do you find Z when the temperature line ends on the compressibility chart?

[zachdr1]

How do you find a value for Z using the compressibility chart when the temperature line you're trying to use ends?

For example, if you look at the compressibility chart and try to find a value for z with P_r = .75 and T_r = .96, you will notice that the line for T_r = .95 ends well before the pressure of .75. How do you find a value for Z in this situation?

 

[Bystander]

How many phases do you have to deal with when P_r, T_r are less than 1.0?

 

[zachdr1]

How many phases do you have to deal with when P_r, T_r are less than 1.0?

1

 

[Chestermiller]

 

[zachdr1]

View attachment 105938

Why do the Tr lines stop increasing in Pr after a while?

 

[Chestermiller]

Why do the Tr lines stop increasing in Pr after a while?

What do you think the dashed line in the figure represents?

 

[zachdr1]

What do you think the dashed line in the figure represents?

the psuedo reduced specific volume

edit: i just realized you meant the saturated vapor line, anything below that line isn't a saturated vapor so I am assuming you can't use Pv=ZRT?

So if I asked you what the value for Tr is at Pr= .4 and Z=.6, what would your response be? This isn't a homework question by the way I just want to know what your response would be.

 

[Chestermiller]

the psuedo reduced specific volume

edit: i just realized you meant the saturated vapor line, anything below that line isn't a saturated vapor so I am assuming you can't use Pv=ZRT?

So if I asked you what the value for Tr is at Pr= .4 and Z=.6, what would your response be? This isn't a homework question by the way I just want to know what your response would be.

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