Experience Chemistry Lesson 12.4

​Lesson 12.4: Free Energy and Entropy

​Recap

• Enthalpy: A change in heat during a reaction

  • Ne​gative energy is a release of heat and exothermic

    • Combustion reactions are all exothermic, releasing heat and energy​

  • Positive energy is an absorption of heat and is endothermic

Experience Chemistry | Lesson 12.4

​Free Energy And Favorability

• Free Energy: the overall energy change for a process

  • it is free to do things and work

  • Is made up of enthalpy, the temperature it happens at, and the organization of the partices

• Thermodynamically favorable processes: produce free energy in a spontaneous response

  • Don't need an input of energy

• Thermodynamically unfavorable processes: do not release free energy

  • need an input of energy

Experience Chemistry | Lesson 12.4