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# Free Energy & Equilibrium (College)

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## Free Energy & Equilibrium

1.
Which of the following correctly represents the relationship between the free energy change for a reaction at 1 atm and K?
1. ∆Gº=RTln(K)
2. ∆Gº=-RT/ln(K)
3. ∆Gº=R/Tln(K)
4. ∆Gº=-RTln(K)

2.
Which of the following correctly represents when the equilibrium point occurs?
1. When the value of ∆Gº=1, only
2. When the value of ∆Gº<0, only
3. When the value of ∆Gº>0, only
4. At the lowest value of free energy available to the system
3.
Which of the following equations correctly represents the equation for free energy for a reaction that is NOT at equilibrium?
1. ∆Gº=-RTlnK
2. ∆G=∆Gº+RTln(Q)
3. ∆G=∆Gº-RTln(Q)
4. ∆G=∆Gº-RT/ln(Q)

4.
Which of the following equations correctly describes a system that is at equilibrium?
1. ∆G<0 and K=Q
2. ∆G>0 and K=Q
3. ∆G=0, only
4. ∆G=0 and K=Q
5.
Which of the following values is the value for ∆Gº, assuming that K>1?
1. ∆Gº<0
2. ∆Gº>0
3. ∆Gº=0
4. ∆Gº=1

6.
Which of the following is the value of ∆Gº, assuming that K=1?
1. ∆Gº>0
2. ∆Gº<0
3. ∆Gº=0
4. ∆Gº=1
7.
Which of the following correctly represents ln(K), in terms of temperature?
1. $ln(K)={-∆Hº}/{RT}-{∆Sº}/{R}$
2. $ln(K)={∆Hº}/{RT}-{∆Sº}/{R}$
3. $ln(K)={∆Hº}/{RT}+{∆Sº}/{R}$
4. $ln(K)={-∆Hº}/{RT}+{∆Sº}/{R}$

8.
Which of the following represents ∆Gº, in terms of temperature?
1. $∆Gº=∆Hº+T∆Sº$
2. $∆Gº=∆Hº-T∆Sº$
3. $∆Gº=∆Hº-T/{∆Sº}$
4. $∆Gº=-∆Hº-T∆Sº$
9.
When ln(K) increases, temperature tends to                       .

10.
Derive the expression for ∆Gº, based on the expression for ln(K).

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