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Entropy, Free Energy, Equilibrium

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1. Define entropy and relate to probability of microstate formation.

2. Relate entropy and reaction spontaneity, Gibbs free energy and reaction spontaneity, and Gibbs free energy and the equilibrium constant of a reaction.

3. Calculate the entropy change within a system and determine absolute entropies.

4. In your own words, define entropy. Provide one everday example resulting in an increase in entropy, and another resulting in a decrease.

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Solution Preview

1. The entropy of any system, S, is defined as:

S = k*ln(Pmax)

where Pmax is the number of microstates corresponding to the most probable distribution of the system and k is the Boltzmann constant (1.3803 × 10-16 ergs per degree C)

2. The Second Law of Thermodynamics: The entropy of the universe increases for any spontaneous reaction. Applied to a chemical system this means that the entropy of a system can increase or decrease but if it does decrease, then the ...

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This solution provides calculations for various calculations for questions regarding entropy.

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