Chapter 17 Flashcards

1
Q

Energy of the universe

A

Constant

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2
Q

What makes up the energy of the universe

A

System and surroundings

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3
Q

Enthalpy

A

🔺H
Movement of heat

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4
Q

-🔺H

A

Exothermic

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5
Q

+🔺H

A

Endothermic

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6
Q

Spontaneity

A

How stable a reaction is
Nothing to do with speed or catalysts
Generally exothermic

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7
Q

Thermodynamics

A

The direction and extent of a reaction

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8
Q

Kinetics

A

The speed of a reaction

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9
Q

Heat

A

q
The energy tax, must be lost to be spontaneous

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10
Q

Factors of spontaneity

A

Enthalpy and entropy
Proceeds to lowest potential energy

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11
Q

Entropy increases

A

With the number of ways a system can rearrange itself

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12
Q

-🔺S

A

Nonspontaneous

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13
Q

+🔺S

A

Spontaneous

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14
Q

Entropy

A

S
Disorder

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15
Q

What increases entropy

A

Less ordered states
Larger number of molecules or mols
Increase in temp
Dissociation

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16
Q

Unique things about entropy

A

Even elements have it
Has a value unless at absolute zero

17
Q

What affects 🔺S

A

State
Allotrope
Molar mass
Molecular complexity
Extent of dissolution

18
Q

Gibbs free energy

A

G
The amount of energy available to do work

19
Q

-🔺G

A

Spontaneous

20
Q

+🔺G

A

Nonspontaneous

21
Q

System ends

A

Reactions never reach their theoretical limit, energy is lost as heat, so the system must die

22
Q

G units

A

KJ

23
Q

S units

A

J/K

24
Q

H units

A

KJ

25
Q

For a process to be spontaneous

A

The entropy of the universe must increase

26
Q

1st law of thermodynamics

A

Energy is never lost

27
Q

2nd law of thermodynamics

A

Universe entropy must increase for a reaction to be spontaneous

28
Q

3rd law of thermodynamics

A

Absolute entropy
Everything has entropy unless it is at absolute zero

29
Q

Large k

A

More spontaneous