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Conceptual Physics 12.2 - Changes of State and the Laws of Thermodynamics Flashcards | StudBud
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Conceptual Physics 12.2 - Changes of State and the Laws of Thermodynamics
Entropy is the measurement of
What is the heat of fusion?
Conceptual Physics 12.2 - Changes of State and the Laws of Thermodynamics
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1
What is the heat of fusion?
The energy it takes for particles to remain in a phase
The energy it takes to transform a liquid to a gas
The energy it takes to change phases
The energy it takes to transform a solid to a liquid
2
Entropy is the measurement of
density
temperature
disorder
heat
3
Heat flows from warmer objects to cooler objects because of the
Second Law of Thermodynamics
First Law of Thermodynamics
4
Which of the following is an example of a heat engine?
Refrigerator
Internal Combustion Engine
Heat Pump
Steam Engine
5
Freezing water decreases entropy.
True
False
6
On the graph, when is the object boiling?
B
A
C
D
7
The efficiency of a heat engine depends on
The waste heat and the output work
Its design
The amount of waste heat
The input heat and the output work
8
A refrigerator
pumps heat from a cold reservoir to a hot reservoir.
operates without work.
pumps heat from a hot reservoir to a cold reservoir.
Overall, refrigerators reduce heat.
9
On the graph, when is the object melting?
A
D
B
C
10
When calculating the heat required to melt a solid, which equation should you use?
Q = mHf
ΔU = Q - W
Q = mHv
Q = mCΔT
11
What do Heat of Fusion and Heat of Vaporization problems share?
Solutions to these problems are measured in joules
They share the same formula
They do not share anything and are opposites
12
As temperature increases, entropy
stays the same
decreases
increases and then decreases
increases
13
The study of thermal energy transformations is...
thermodynamics
momentum
physics
dynamics
14
When calculating the heat required to change the temperature of a material, which equation should you use?
ΔU = Q - W
Q = mHv
Q = mHf
Q = mCΔT
15
To decrease entropy, you need
An input of energy
N/A, decreasing entropy is not possible
16
When calculating the heat required to vaporize a liquid, which equation should you use?
Q = mHf
Q = mHv
ΔU = Q - W
Q = mCΔT
17
Heat Pumps need electricity to work
False
True
18
What is the heat of vaporization?
The energy it takes for particles to remain in a phase
The energy it takes to change phases
The energy it takes to transform a solid into a liquid
The energy it takes to transform a liquid into a gas
19
Melting of ice ____ entropy
negative
increases
doesn't change
decreases
20
The First Law of Thermodynamics is a restatement of the Law of Conservation of
Energy
Mass
Charge
Momentum
