Final Exam Flashcards

1
Q

Measure of chaos within a system

A

Entropy

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2
Q

Do gases have low or high entropy?

A

High

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3
Q

Do solids have low or high entropy?

A

Low

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4
Q

A change from low entropy to high entropy has a positive or negative ΔS?

A

Positive ΔS

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5
Q

As entropy increases does the amount of moles increase or decrease?

A

Decrease

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6
Q

Positive ΔS favors spontaneity or non-spontaneity?

A

Spontaneity

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7
Q

What happens to ΔG when put in a reversed reaction?

A

It remains the same value but the sign becomes opposite

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8
Q

Do low activation energy reactions or high activation energy reactions have a high reaction rate?

A

Low activation energy reactions

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9
Q

Energy required for a reaction to occur

A

Activation Energy E_a

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10
Q

Does a catalyst increase or decrease the activation energy?

A

Decrease

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11
Q

Does a catalyst increase or decrease the rate of a reaction?

A

Increase

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12
Q

Does an increase in concentration increase or decrease the rate of a reaction?

A

Increase

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13
Q

Does an increase in temperature increase or decrease the rate of a reaction?

A

Increase

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14
Q

If the rate of the reaction is equal to the rate of the reversed reaction this is an example of?

A

Equilibrium

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15
Q

Equilibrium constant

A

K=[C]^c[D}^d/[A]^a[B]^b

Reaction: aA+bB–> cC+dD

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16
Q

An increase in concentration of reactants shifts the equilibrium towards?

17
Q

An increase in temperature of reactants shifts the equilibrium towards?

18
Q

An increase in pressure shifts equilibrium towards?

A

The side with fewer moles

19
Q

How does a catalyst affect the equilibrium?

A

Equilibrium does not change

20
Q

Solid to liquid

21
Q

Liquid to solid

22
Q

Liquid to gas

A

Vaporization

23
Q

Gas to liquid

A

Condensation

24
Q

Solid to gas

A

Sublimation

25
Gas to solid
Deposition
26
What value of ΔH occurs during melting?
Positive because heat is absorbed
27
What value of ΔH occurs during condensation?
Negative because heat is released
28
Intermolecular forces weakest to strongest?
London Dispersion, Dipole-Dipole, Hydrogen Bonding, Ionic Intermolecular forces weakest to strongest?
29
Dipole-Dipole intermolecular force only occurs between _______________ molecules?
Polar
30
Hydrogen Bonding intermolecular force only occurs between ____________ bonds?
H-F, H-O, H-N
31
Intermolecular forces within C2H5Cl?
London Dispersion, Dipole-Dipole