Entropy and Gibbs free energy

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12 Terms

1

What is entropy?

Entropy is a measure of disorder (or randomness)

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2

When particles become more disordered what happens to entropy?

Entropy increases as particles become more disordered

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3

As we move from a solid to a liquid to a gas what happens to entropy?

Entropy increases as we move from a solid to a liquid to a gas

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4

Why is entropy change from a liquid to a gas higher than the change from a solid to a liquid?

Larger difference of disorder

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5

What happens to entropy if the number of moles increase in a reaction?

Entropy will also increase if the number of moles increases in a reaction

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6

What is the equation for calculating entropy?

Entropy= (sum of products) - (sum of reactants)

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7

What is the equation for Gibbs free energy?

ΔG= ΔH -TΔS

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8

If the value of ΔG is less than 0 what can be said about the reaction?

The reaction is feasible

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9

If the value of ΔG is equal to 0 what can be said about the reaction?

The reaction is at equilibrium

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10

If the value of ΔG is less than 0 what can be said about the reaction?

The reaction is not feasible

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11

When calculating Gibbs free energy what must we do to to the entropy change?

Divide it by 1000

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12
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