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Chapter 11 Liquids, Solids, and Intermolecular Forces 227 11.33 A phase diagram is a map of the phase of a substance as a function of pressure (on the y-axis) and temperature (on the x-axis). Phase Diagram for Water SUPERCRITICAL FLUID Fusion curve LIQUID Vaporization curve SOLID Critical point Pressure (not to scale) 760 torr Sublimation curve Triple point GAS 0°C 100°C Temperature (not to scale) When a line is crossed in a phase diagram, it means that a phase transition has occurred. Problems by Topic Intermolecular Forces 11.35 (a) dispersion forces (b) dispersion forces, dipole-dipole forces, and hydrogen bonding (c) dispersion forces and dipole-dipole forces (d) dispersion forces 11.37 (a) dispersion forces and dipole-dipole forces (b) dispersion forces, dipole-dipole forces, and hydrogen bonding (c) dispersion forces (d) dispersion forces 11.39 (a) CH₄