Learning objecties
By the end of this lecture you will be able to:
• Decide what represents the best system
• Calculate reacton enthalpies
• Recall the 4 laws of thermodynamics and explain them
• Understand the concepts of spontaneity, entropy and
reversibility
• Calculate Gibbs free energy
• Make a choice between using entropy and Gibbs free
energy as a predictng tool
• Relate Gibbs free energy to the equilibrium constant
,3 key questons
AB
Thermodynamics
• Will a reacton occur at all?
• How much energy will be absorbed or
released?
• How fast will the reacton be? Kinetcs
, Beaker = System
Lab around the beaker = Surroundings
Conientons Lab with the beaker = Universe
System +
UN
Surroundings
IVE
RSE
System
Surroundings What you want to
study
What is around it
, Energy
• In Thermodynamics we are interested in the energy
process
• Energy can be exchanged between the system and the
surroundings through work (w) and through heat (q)
• They are both processes of energy transfer and not
forms of energy
By the end of this lecture you will be able to:
• Decide what represents the best system
• Calculate reacton enthalpies
• Recall the 4 laws of thermodynamics and explain them
• Understand the concepts of spontaneity, entropy and
reversibility
• Calculate Gibbs free energy
• Make a choice between using entropy and Gibbs free
energy as a predictng tool
• Relate Gibbs free energy to the equilibrium constant
,3 key questons
AB
Thermodynamics
• Will a reacton occur at all?
• How much energy will be absorbed or
released?
• How fast will the reacton be? Kinetcs
, Beaker = System
Lab around the beaker = Surroundings
Conientons Lab with the beaker = Universe
System +
UN
Surroundings
IVE
RSE
System
Surroundings What you want to
study
What is around it
, Energy
• In Thermodynamics we are interested in the energy
process
• Energy can be exchanged between the system and the
surroundings through work (w) and through heat (q)
• They are both processes of energy transfer and not
forms of energy
