Thermodynamics and Electrochemistry Concepts

Jeremy Krug reviews AP Chemistry Unit 9, focusing on thermodynamics. He explains entropy, Gibbs Free Energy, and their calculations. The video covers thermodynamic favorability, equilibrium constants, and the role of temperature. It also discusses galvanic and electrolytic cells, highlighting their components and functions. The tutorial concludes with encouragement for further study.

Which state of matter has the highest entropy?

• Aqueous solution

• Gas

• Liquid

• Solid

What does a negative delta G indicate about a chemical reaction?

• The reaction is endothermic

• The reaction is exothermic

• The reaction is thermodynamically favored

• The reaction is at equilibrium

Under what conditions is a reaction with positive delta H and positive delta S favored?

• At low temperatures

• At no temperature

• At all temperatures

• At high temperatures

What is the term for a reaction that is thermodynamically favored but proceeds very slowly?

• Equilibrium control

• Kinetic control

• Thermodynamic control

• Catalytic control

How is Gibbs Free Energy related to the equilibrium constant?

• Directly proportional

• Inversely proportional

• Not related

• Equal to the equilibrium constant

What is required to make an unfavorable reaction occur?

• Increase in reactant concentration

• External energy input

• Decrease in temperature

• Increase in pressure

In a galvanic cell, where does oxidation occur?

• Cathode

• Salt bridge

• Electrolyte

• Anode

What flows through the wire in a galvanic cell?

• Ions

• Electrons

• Neutrons

• Protons

What is the role of the salt bridge in a galvanic cell?

• To generate electricity

• To equalize charge

• To increase voltage

• To decrease resistance

What is the main difference between galvanic and electrolytic cells?

• Electrolytic cells are thermodynamically favored

• Galvanic cells produce electricity

• Electrolytic cells have no electrodes

• Galvanic cells require external power