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When is a reaction spontaneous?
when it proceeds under the specified conditions.
What is the entropy of a system?
What are its units?
- k = R/avagadro's
- W= number of microstates
What is the change of entropy in a system when heat is added?
What is standard molar entropy?
- Because entropy depends on amount of substance we define it to have units of J mol-1 K-1
Calculate the standard entropy of a reaction
- Where m and n are moles of products and reactants
Calculate the ⌂Ssurr
- At constant pressure:
Calculate the free energy of a system.
Calculate the ⌂Gsys
What can it tell us?
- ⌂G<0: Spontaneous
- ⌂G=0: Equilibrium
- ⌂G>0: Nonspontaneous
- How much work can be done by (or needs to be done to) a system
What is another way to calculate ⌂G?
What would you like to do?
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