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Thermodynamics & Free Energy - Coggle Diagram
Thermodynamics & Free Energy
2nd Law of Thermo
if spontaneous, delta S will increase
heat flows from hot to cold
3rd Law of Thermo
the entropy of a perfect crystalline structure at absolute zero is 0
Therefore entropy should be positive for the reaction to go
Absolute 0 is 0 Kelvin where all molecular motion stops
Spontaneity
if a reaction will occur by itself, without anything acting upon it to start it
Entropy
Delta S
must be positive
increases with more
disorder
S -> l
l -> g
g -> S
Increase in temperature
how dispersed and disorders a the energy in a system is
typically spontaneous when positive
Enthalpy
Typically spontaneous when negative (exothermic)
Typically nonspontaneous when positive (endothermic)
delta H
Free Energy
Gibbs Free Energy
The amount of energy available to do work
Delta G
Typically spontaneous when negative
delta G is 0 at equillibrium
delta G standard= delta H standard - (Temperature)(delta S standard)
entropy and enthalpy alone does not indicate spontaniety
Calculated By
Delta S, Delta H, and Temp given
Finding Delta S and Delta H through formation rxns
Hess's Law (coupled reactions)