Phase Equilibrium

A _______ is a set of components that are being studied.

A lava lamp has the following phases:

• two liquid phases

• one solid phase and one liquid phase

• two solid phases

• one liquid phase

True or false. Equilibrium is when the rate of evaporation is greater than the rate of condensation.

• True

• False

• I don't know

This is the phase diagram for water. What happens when we are at 100 degrees Celsius and 200 kPa, and we slowly begin to increase the temperature to 250 degrees celsius maintaining our pressure constant?

• we change phases from solid to liquid

• we change phases from liquid to solid

• we change phases from liquid to vapor

• nothing happens

This is the phase diagram for carbon dioxide. What phase is it in at 0 degrees celsius and 324 kPa?

• solid

• vapor

• gas

• liquid

The triple point of carbon dioxide is at −16.7°C and 923 kPa. The critical point is at 59.6°C and 9.78 × 10^3 kPa. Vapor pressure above solid carbon dioxide is 101.3 kPa at −78.5°C. Solid carbon dioxide is denser than liquid carbon dioxide. Sketch the phase diagram. Label your x axis and y axis. Show a clear diagram. Remember this is graded. After you graph your phase diagram, answer the following question:

a. What state is sulfur dioxide in at 200 kPa and −100°C?