Single-Component Phase Equilibrium: ConcepTest and Example Problem

Try to answer this ConcepTest and solve the example problem before using this module. Studies show that trying to answer the questions before studying material improves learning and retention. We suggest that you write down the reasons for your answers. By the end of this module, you should be able to answer these on your own. Answers will be given at the end of this module.

Image for a concepTest for the Single-Component Phase Equilibrium Module
Example Problem 1

Solid iodine is added to a glass tube, which is evacuated to remove all other components, sealed and heated to 50°C. There are a few solid crystals in the bottom of the tube and a visible colored vapor filling the remainder of the tube. A second tube is prepared identically, but twice the amount of iodine is added. The second tube is evacuated of all other components, sealed and heated to 50°C. How are the two tubes different? Explain.