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Law of Thermodynamics

Total questions: 20

Worksheet time: 13mins

Name
Class
Date
1.
Why is water often used as a coolant in automobiles, other than the fact that it is abundant?
a)
Water expands very little as it is heated.
b)
The freezing temperature of water has a relatively large value.
c)
The specific heat of water is relatively small and its temperature can be rapidly decreased.
d)
The specific heat of water is relatively large and it can store a great deal of thermal energy.
e)
Water does not easily change into a gas.
2.
Heat is added to a substance, but its temperature does not increase. Which one of the following statements provides the best explanation for this observation?
a)
The substance has unusual thermal properties.
b)
The substance must be cooler than its environment.
c)
The substance must be a gas.
d)
The substance must be an imperfect solid.
e)
The substance undergoes a change of phase.
3.
Complete the following statement: The first law of thermodynamics states that…
a)
the entropy of the universe is increasing.
b)
entropy is a function of the state of a system.
c)
heat is a form of energy.
d)
the change in the internal energy of a system is given by Q − W.
e)
two systems in thermal equilibrium with a third system are in equilibrium with each other.
4.
When applying the first law of thermodynamics to a system, when is heat a positive quantity?
a)
when the system does work
b)
when the system has work done on it
c)
when the system absorbs heat
d)
when the system loses heat
e)
when no work is done either on the system or by the system
5.
Which one of the following phrases correctly describes an adiabatic process?
a)
no loss of energy occurs
b)
no transfer of energy as heat
c)
no change in temperature occurs
d)
no change in system volume occurs
e)
no change in system pressure occurs
6.
The product of the pressure and volume of a system  has the same SI units as which one of the following choices?
a)
force
b)
work
c)
acceleration
d)
momentum
e)
impulse
7.

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

a)

mass

b)

work done

c)

force

d)

pressure

8.

The first law of thermodynamics is a restatement of the

a)

Zeroth law of thermodynamics

b)

Law of heat addition

c)

Principle of entropy

d)

Conservation of energy

9.

The internal energy of an ideal gas depends on

a)

Volume and temperature

b)

Pressure and temperature

c)

Volume

d)

Temperature only

10.

The internal energy change in a system that has absorbed 2Kcal of heat and done 500J of work is

a)

7900J

b)

8900J

c)

6400J

d)

5400J

11.

When a gas undergoes isothermal expansion, its internal energy

a)

Increase

b)

decrease

c)

remains constant

d)

zero

12.

The conditions for the thermodynamic process to be isothermal,

a)

Temperature remains constant

b)

Pressure remains constant

c)

The process should be very slow and the walls of cylinder should be perfectly conducting

d)

The process should be very fast and the walls of cylinder should be perfectly non-conducting

13.
What is the equation for the first law of thermodynamics?
a)
U=Q+W
b)
U=Q-W
c)
U=-Q+W
d)
U+Q+W=0
14.
The first law of thermodynamics is basically the same as which law from physics 1?
a)
Newton's first law
b)
The law of conservation of energy
c)
The law of conservation of momentum
d)
Newton's second law
15.
The SI unit for measuring heat is the 
a)
pascal
b)
newton
c)
Joule
d)
calorie
16.
Thermodynamics is the study of what?
a)
The transfer of energy
b)
The creation of energy
c)
The speed of reactions 
d)
The affect of heat on the speed of a reaction 
17.
The amount of heat needed to melt one mole of a substance is called:
a)
Specific Heat
b)
Latent Heat
c)
Heat of vaporization
d)
Heat of fusion
18.
The temperature of a glass of cold water will eventually...
a)
Match the temperature of the surrounding environment.
b)
Always be colder than the surrounding environment.
c)
Become warmer than the surrounding environment.
d)
Never change temperature.
19.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
20.
The Law of _______________ states that energy cannot be created nor destroyed only transferred 
a)
Specific Heat
b)
Conservation of Energy
c)
Exothermic Reaction
d)
Potential Energy

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