Thermodynamics

• Using Hess's law

  • So gaseous ions Na+(g) and Cl-(g) can either form an ionic compound NaCl which would the give enthalpy of lattice of formation
  • Or they form hydrated ions Na+(aq) and Cl-(aq) which would give the enthalpy of hydration
  • And NaCl can form hydrated ions this would give the enthalpy of solution