Gibs Free energy

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12 Terms

1
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what does gibs free energy determine

determines reactions feasibility

2
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How to calculate entropy change of surroundings

-ΔH / T

3
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units of ΔS surroudnings

KJ K-1 mol-1 x 100 = JK-1mol-1

4
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how to calculate gibs free energy

ΔG = ΔH -TΔS

5
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what does negative ΔG mean

feasable

6
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units for equation for ΔG

all Δ - KJ

7
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different feasibility to negatives and positives ΔG and Δ S

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8
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how to work out ΔS using graph

gradient → reverse graph → convert JK-1mol-1

9
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how to work out ΔH using graph

using y intercept

10
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how to determine temperature of feasibility using graph

when line is below 0

11
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how to determine temperature of feasibility using equation

set ΔG equal to 0

ensure ΔH and ΔS are in KJ-1mol-1

12
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why would a reaction be feasible but nothing happen

Activation energy too low so rate of reaction too slow