Skip to main content
Engineering LibreTexts

3.3: Action Item

Answer the following problems, and submit your answers to the drop box in ANGEL that has been created for this module.

Please note:

  • Your answers must be submitted in the form of a Microsoft Word document.
  • Include your Penn State Access Account user ID in the name of your file (for example, "module2_abc123.doc").
  • The due date for this assignment will be sent to the class by e-mail in ANGEL.
  • Your grade for the assignment will appear in the drop box approximately one week after the due date.
  • You can access the drop box for this module in ANGEL by clicking on the Lessons tab, and then locating the drop box on the list that appears.

Problem Set

  1. Explain in your own words (no more than a paragraph) why the 2-Phase segment of the P-v isotherm should correspond to one single point in the P-T diagram.
  2. What about the critical point in the P-T diagram? Which P-v isotherm could that correspond to?
  3. Take two different hydrocarbons (say, C1 and C2) and compare their P-T vapor pressure curves. What do you notice? As you saw in the previous module, those P-T curves will be found at different conditions of pressure and temperature. But more than that, what can you comment about the slopes of both curves? Are they different? Why? Speculate.


  • Prof. Michael Adewumi (The Pennsylvania State University). Some or all of the content of this module was taken from Penn State's College of Earth and Mineral Sciences' OER Initiative.