What is entropy?

Entropy and Gibbs Free Energy

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Science
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12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Entropy is a measure of the disorder or randomness in a system. It quantifies the number of microscopic configurations that correspond to a thermodynamic system's macroscopic state.
2.
FLASHCARD QUESTION
Front
What does it mean for a process to be thermodynamically favorable?
Back
A thermodynamically favorable process is one that occurs spontaneously under given conditions, typically characterized by a decrease in Gibbs free energy (ΔG < 0).
3.
FLASHCARD QUESTION
Front
What is Gibbs Free Energy?
Back
Gibbs Free Energy (G) is a thermodynamic potential that measures the maximum reversible work obtainable from a thermodynamic system at constant temperature and pressure.
4.
FLASHCARD QUESTION
Front
What is the relationship between entropy and Gibbs Free Energy?
Back
The relationship is given by the equation ΔG = ΔH - TΔS, where ΔG is the change in Gibbs Free Energy, ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.
5.
FLASHCARD QUESTION
Front
What does a negative change in entropy (ΔS < 0) indicate about a process?
Back
A negative change in entropy indicates that the process leads to a decrease in disorder or randomness in the system.
6.
FLASHCARD QUESTION
Front
What is the significance of ΔH in thermodynamic processes?
Back
ΔH represents the change in enthalpy, which indicates the heat absorbed or released during a process at constant pressure.
7.
FLASHCARD QUESTION
Front
What conditions make a process thermodynamically favorable at all temperatures?
Back
A process is thermodynamically favorable at all temperatures if ΔS > 0 (increase in entropy) and ΔH < 0 (exothermic reaction).
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