PHASE DIAGRAMS

• Endothermic

  • the transformation from a more condensed phase to a less condensed phase (i.e., solid to liquid) requires energy
• Exothermic

  • changes from a less condensed phase to a more condensed phase (i.e., gas to liquid) releases energy.
• Clausius Clapeyron equation

  • The relationships between the vapor pressure (P), absolute temperature (T), and the enthalpy of vaporization (ΔHvap) are given by the