We’re being asked to determine the normal boiling point and critical pressure of a given substance base on its phase diagram.
Recall that a phase diagram shows the transition of matter between solid, liquid, and gas phases as temperature and pressure changes.
In a phase diagram, the different phases can be identified by their location:
• Solid: can be found at high pressure and low temperature; labeled A in the phase diagram
• Liquid: can be found between the solid and gas regions; labeled B
• Gas: can be found at low pressure and high temperature; labeled C
For the choices below, what is the normal boiling point of this substance?
What is the critical pressure for this substance?
1. 50 atm
2. 0.08 atm
3. 44 atm
4. 25 atm
5. 1 atm
6. >100 atm
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