A piece of dry ice (solid CO2) is placed in an enclosed glass container. Discuss what occurs at the particle level. Use the postulates of the kinetic molecular theory to explain what happens to the particles as the temperature changes. Explain phenomenon using the following terms: states of matter, solid, liquid, gas, phase changes, melting, boiling, freezing, sublimation, deposition, pressure, volume, temperature, rigid, flexible, kinetic energy.