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6: Thermodynamics

Students calculate delta G and Keq, determine whether reactions are spontaneous, and interpret free energy diagrams for enzyme-catalyzed reactions.

LibreTexts reference: Unit 2, Chapter 1: Enzyme Thermodynamics LibreTexts

Energy Requirement Categories and Energy Terms

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Match each energy requirement category with its corresponding energy term.

Note: Each choice will be used exactly once.

Your Choice Prompt
Drop Your Choice Here 1. requires energy input
Drop Your Choice Here 2. releases energy

Drag one of the choices below:

  • A. condensation reactions
  • B. catabolic
 

True/False Statements About Gibbs Free Energy (Delta G = Delta H - T Delta S)

Click to show True/False Statements About Gibbs Free Energy (Delta G = Delta H - T Delta S) example problem

Which one of the following statements is TRUE of the Gibbs free energy, ΔG = ΔH – TΔS?

 

True/False Statements About Thermodynamics and Kinetics

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Which one of the following statements is TRUE of thermodynamics and kinetics?

 

Energy Requirement Categories for Energy Terms

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Which one of the following energy requirement categories correspond to the energy term 'ΔG > 0'.

 

Biochemical vs Chemical Standard Free Energy States

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ΔG°′ (delta G naught-prime, ΔG°′) adjusts the standard state conditions used in ΔG° (delta G naught, ΔG°). What does it adjust?
 

Exergonic and Endergonic Reaction Classification

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A reaction is classified as endergonic. Which statement about ΔG is true?
 

Free Energy and Equilibrium Constant Relationships

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If the equilibrium constant (K′eq) is greater than 1, what is the sign of the standard transformed Gibbs free energy change (ΔG°′)?
 

Gibbs Free Energy Equation Symbols and Meanings

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In the equation ΔG = ΔH − TΔS, match each symbol to the quantity it represents.
Your Choice Prompt
Drop Your Choice Here 1. ΔG
Drop Your Choice Here 2. ΔH
Drop Your Choice Here 3. T
Drop Your Choice Here 4. ΔS

Drag one of the choices below:

  • A. change in enthalpy
  • B. absolute temperature (Kelvin)
  • C. change in Gibbs free energy
  • D. change in entropy
 

Thermodynamics Law Statements

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Select the statement that matches the Second Law of Thermodynamics.
 

Energy and Entropy Conservation in Open, Closed, and Isolated Systems

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According to the first law of thermodynamics, the total energy of a closed system is:
Â