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Questions and Answers
What does Gibbs free energy (DG) indicate in a chemical reaction or phase change?
What does Gibbs free energy (DG) indicate in a chemical reaction or phase change?
- The rate of the reaction
- Whether the reaction is spontaneous or not (correct)
- The amount of energy required for the reaction
- The amount of energy released during the reaction
Which factor characterizes a phase transition without changes in chemical composition?
Which factor characterizes a phase transition without changes in chemical composition?
- Enthalpy change
- Gibbs free energy change
- Related free energy (correct)
- Entropy change
In what scenario does a phase transition predicted to be spontaneous from thermodynamics may practically occur slowly?
In what scenario does a phase transition predicted to be spontaneous from thermodynamics may practically occur slowly?
- When the entropy change is significant
- When the pressure is high
- When the temperature is low (correct)
- When the enthalpy change is significant
What does Gibbs free energy (DG) not indicate about a chemical reaction?
What does Gibbs free energy (DG) not indicate about a chemical reaction?
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What is the relationship between Gibbs free energy and whether a reaction is spontaneous or not?
What is the relationship between Gibbs free energy and whether a reaction is spontaneous or not?
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