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Chemistry LibreTexts

3.7: Solutions and Phase Changes

  • Page ID
  • Unit Objectives

    • Describe the processes represented by typical heating and cooling curves, and compute heat flows and enthalpy changes accompanying these processes
    • Explain the construction and use of a typical phase diagram
    • Use phase diagrams to identify stable phases at given temperatures and pressures, and to describe phase transitions resulting from changes in these properties
    • Describe the supercritical fluid phase of matter
    • Describe the effects of temperature and pressure on solubility
    • State Henry’s law and use it in calculations involving the solubility of a gas in a liquid
    • Explain the degrees of solubility possible for liquid-liquid solutions
    • Define the concentration units of mass percentage, volume percentage, mass-volume percentage, parts-per-million (ppm), and parts-per-billion (ppb)
    • Perform computations relating a solution’s concentration and its components’ volumes and/or masses using these units\
    • Express concentrations of solution components using mole fraction and molality
    • Describe the effect of solute concentration on various solution properties (vapor pressure, boiling point, freezing point, and osmotic pressure)
    • Perform calculations using the mathematical equations that describe these various colligative effects

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