Worksheet: The Phase Rule
In this worksheet, we will practice using the phase rule to determine the degrees of freedom in a system from the numbers of components and phases.
Which of the following statements is incorrect?
- AWhen three phases coexist in equilibrium in a one-component system, one of the phases must be a gas, one must be a liquid, and one must be a solid.
- BFor a one-component system, the most stable phase at given and is the phase with the lowest molar Gibbs free energy, .
- CFor a pure substance, the vapor pressure of the solid is equal to the vapor pressure of the liquid at the triple-point temperature.
- DFor a one-component system, the maximum number of phases that can coexist in equilibrium is three.