Formation Table

• Formation table: the energy change (enthalpy released or absorbed) when 1 mol of a compound is formed from its elements at standard conditions - SATP - measured in KJ/mol
• Formation reaction:

  element + element -> compound

  • ∆H = + : endothermic
  • ∆H = -: exothermic
• Formation reaction can also like combustion or corrosion equations
• Decomposition: the opposite of formation (flip the sign)

  • compound -> element + element
• Thermal stability: the tendancy of a compound to resist decomposition when heated. The more exothermic the formation value (the smaller the number) the more thermal stability

  • Big -# = lots of energy to decompose