Phase diagram p-v and plasmatic state

[Ricardo Luis]

phase diagrams show the change of the state when temperature or pressure are modified. to achieve this, is necessary heat, but my questions is: would plasma state be described in this diagrams?

is this figure true? because plasma state can be generated by heating.

 

[DrClaude]

That's too vertical for my taste. There will be a dependence on pressure also. The following figure from http://www.opencourse.info/astronomy/introduction/08.matter_phases/ is more representative: