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Thermodynamics Review

Total questions: 26

Worksheet time: 25mins

Name
Class
Date
1.

According to the second law of thermodynamics, natural processes go in the direction that ____ the total entropy of the universe.

a)

Increases or Decreases

b)

Increases

c)

Decreases

d)

maintains

2.

The total change in the thermal energy of a system is the heat added to it minus the ____ the system.

a)

entropy of

b)

work done by

c)

kinetic energy of

d)

temperature of

3.

The form of energy transfer that takes place in a house heated by forced air is primarily ____ .

a)

Convection

b)

Conduction

c)

Radiation

d)

Induction

4.

If the final temperature of a system is greater than the initial temperature, Δt is __________.

a)

positive

b)

eliminated

c)

negative

d)

reduced

5.

__________ is the amount of energy that must be added to a material to raise one unit of mass by one temperature unit.

a)

Temperature

b)

Specific Heat

c)

Radiation

d)

Hotness

6.

Thermodynamics is the study of __________.

a)

Heat

b)

Light

c)

Stars

d)

Sound

7.

In which direction does thermal energy flow?

a)

From hot to cold

b)

From cold to hot

c)

From light to dark

d)

Either from hot to cold or from cold to hot

8.

Absolute zero is __________.

a)

273.15 K

b)

273.15 F

c)

-273.15 C

d)

-273.15 K

9.

You have equal masses of four of the substances listed. All are at the same initial temperature. If you place them in a warmer room, which of the substance's temperature will increase most rapidly?

a)

Iron

b)

Aluminum

c)

Lead

d)

Zinc

10.

The Sun warms the Earth by __________.

a)

Convection

b)

Conduction

c)

Radiation

d)

Induction

11.

The thermal energy needed to boil a liquid is the heat of __________.

a)

Condensation

b)

Vaporization

c)

Fusion

d)

Specific heat

12.

Using information from the table below, determine which of the following processes requires the most added energy.

a)

1 kg of iron is changed from liquid to gas.

b)

2 kg of water is evaporated.

c)

1 kg of liquid mercury is frozen.

d)

1 kg of copper is converted from solid to liquid.

13.

Heat spontaneously flowing from a cold body to a hot body violates the __________.

a)

Law of conservation of energy

b)

kinetic-molecular law

c)

1st law of thermodynamics

d)

2nd law of thermodynamics

14.

Which is an example of a heat engine?

a)

Windmill

b)

Automobile engine

c)

solar panels

d)

volcano

15.

How much thermal energy must be added to a 250-g aluminum pan to raise its temperature from 200C to 850C? The specific heat of aluminum is 897 J/(kg •K).

a)

1.5 x 104 J

b)

1.0 x 106 J

c)

1.45 x 107 J

d)

2.3 x 104 J

16.

A 1.00-kg block of ice at 0°C is melted and converted to water at 0°C. What is its change in entropy?

a)

1,222.8 J

b)

12,228 J

c)

122,280 J

d)

1.22 x 107 J

17.
The type of heat transfer that happens through direct contact of molecules or particles with each other is ___________________.
a)
Convection
b)
Conduction
c)
Radiation
d)
insulation.
18.
Which statement is true?
a)
The quicker a molecule moves, the colder it is.
b)
The slower a molecule moves, the warmer it is.
c)
The quicker a molecule moves, the warmer it is
d)
The movement on molecule don�t affect its temperature
19.
What phase change brings an increase in entropy?
a)
g->s
b)
l->s
c)
l->g
d)
g->l
20.
Which phase of matter has the greatest motion and least orderly arrangement?
a)
solid
b)
liquid
c)
gas
21.
The heat from a hot burner to a pot is transferred by ______.
a)
convection
b)
insulation
c)
radiation
d)
conduction
22.
The amount of thermal energy required to raise the temperature of one (1) kilogram of a substance by 1o C is known as:
a)
Specific heat
b)
Heat of fusion
c)
Heat of vaporization
d)
Melting point
23.

Entropy increases from solid, liquid to gas. Why?

a)

Molecular dispersion increases

b)

Molecular randomness decreases

c)

Molecules are more energetic

d)

Molecules are more reactive

24.
Temperature is a measure of the...
a)
total energy in a substance
b)
total kinetic energy in a substance
c)
average potential energy in a substance
d)
average kinetic energy of molecules in a substance
25.
Two cups of water, one at 100oC and the other at 50oC are poured into a larger container. What would be the final temperature of the water?
a)
Less than 50oC.
b)
Greaterr than 100oC.
c)
Between  50oC and 100oC.
d)
The water temperature will rise and fall continually.
26.
Heat flows between two objects touching one another only when a difference in _____ exists.
a)
mass
b)
specific heat
c)
density
d)
temperature

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