Chapter 17 Gibbs Free Energy

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Last updated 7:13 PM on 4/22/26
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17 Terms

1
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How do we measure free energy in the universe

ΔG= -TΔS

2
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How do we measure free energy in a system

ΔGsys= ΔHsys-TΔSsystem

3
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When is it always spontaneoud

ΔH:(-)

ΔS: +

4
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When is it never spontaneous

ΔH: +

ΔS: -

5
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WHen is it spontaneous at high temps

ΔH:+

ΔS: +

6
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When is it spontaneous at low temps

ΔH: -

ΔS: -

7
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How do you find delta S or Delat H

products - reactants

8
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What is T when the Gº

298 K

9
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What is ΔG units

kj/mol

10
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Whan can temp do for some reactions

it can interonvert them

11
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What eqution do we use to flip the reaction

T = ΔH/ΔS

12
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What do we use to relate G and equillibrium if solving for G

ΔGº= -RTlnK

13
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What do we use to relate G and equillibrium if solving for K

K = e ^ -ΔG/ RT

14
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What is R

8.314 J/molK

15
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What does a large K value mean

a negative G

16
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What does a small K mean

positive G

17
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What do we use to relate T to K

knK= (-ΔH/RT) + (ΔS/R) or ln (K1/K2) = (-ΔH/RT2) - (-ΔH/RT1)