Chapter 16, Problem 99E

Compare and contrast the phase diagrams of water andcarbon dioxide. Why doesn’t ${\text{CO}}_{\text{2}}$ have a normal meltingpoint and a normal boiling point, whereas water does?The slopes of the solid/liquid lines in the phase diagramsof ${\text{H}}_{\text{2}}\text{O}$ and ${\text{CO}}_{\text{2}}$ are different. What do the slopes of thesolid/liquid lines indicate in terms of the relative densitiesof the solid and liquid states for each substance?How do the melting points of ${\text{H}}_{\text{2}}\text{O}$ and ${\text{CO}}_{\text{2}}$ depend onpressure? How do the boiling points of ${\text{H}}_{\text{2}}\text{O}$ and ${\text{CO}}_{\text{2}}$ depend on pressure? Rationalize why the critical temperaturefor ${\text{H}}_{\text{2}}\text{O}$ is greater than that for ${\text{CO}}_{\text{2}}$ .