CHAPTER 9 WORKSHEETS
Chapter 9, Section 1 Practice A, page 303
__________________________ ________
Name
Period
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These practice problems require the use of the formula(s)
9
TF  TC  32.0
5
TC 
5
(TF  32.0)
9
T  TC  273.15
1st determine what you need to find
2nd determine what variable each
number is.
1. The lowest outdoor temperature ever recorded on Earth is
-128.6F, recorded at Vostok Station, Antarctica, in 1983. What is this
temperature on the Celsius and Kelvin scales?
3rd determine which equation to use.
4th solve the equation
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2. The temperatures of one northeastern state range from 105F in the summer to -25F in winter. Express this
temperature range in degrees Celsius and in kelvins.
Converting 105F to C
?
?
?
?
Converting C to K
?
?
?
?
Converting -25F to C
T  TC  273.15
?
?
- ?
Converting C to K
?
?
?
- ?
=__
Equation
Plug in
Answer
Tc2 -Tc1 = ∆Tc Range
=__
Equation
Plug in
Answer
Tk2 –Tk1 = ∆Tk Range
3. The normal human body temperature is 98.6F. Elliot is “sic” with a fever of 102F. Express these
temperatures in degrees Celsius.
4. A pan of water is heated from 23C to 78C. What is the change in its temperature on the Kelvin and
Fahrenheit scales?
5. Liquid nitrogen is used to cool substances to very low temperatures. Express the boiling point of liquid
nitrogen (77.34 K at 1 atm of pressure) in degrees Celsius and in degrees Fahrenheit.
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Chapter 9 Section 1 Review, page 304
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These practice problems require the use of the formulas
1st determine what you need to find
9
TF  TC  32.0
5
2nd determine what variable each number is.
TC 
5
(TF  32.0)
9
T  TC  273.15
1. Yvonne drops a hot copper pan into a tub of water. If the water’s
temperature rises, what happens to the temperature of the pan?
How will you know when the water and copper pan reach thermal
equilibrium?
3rd determine which equation to use.
4th solve the equation
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2. Oxygen condenses into a liquid at approximately 90.2 K. What temperature is this on both the Celsius and
Fahrenheit temperature scales?
3. The boiling point of sulfur is 444.6C. Sulfur’s melting point is 586.1F lower than its boiling point.
a. Determine the melting point of sulfur in degrees Celsius.
b. Find the melting and boiling points in degrees Fahrenheit.
c. Find the melting and boiling points in kelvins.
4. Which of the following is true for popcorn kernels and the water molecules
inside them during popping?
a. The temperature of the kernels increases.
b. The water molecules are destroyed.
c. The kinetic energy of the water molecules increases.
d. The mass of the water molecules changes.
5.
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5. Two gases that are in physical contact with each other consist of particles of identical mass. In what order
should the images be placed to correctly describe the changing distribution of kinetic energy among the gas
particles?
Which group of particles has the highest temperature at any time? Explain.
6. Mireya tried to make popcorn and found that most of the kernels did not pop, as shown below? What might
be the reason that they did not pop? What could you do to try to make more of the kernels pop?
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Chapter 9 Section 2 Practice B, page 311
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These practice problems require the use of the formulas:
PE  KE  U  0
KE 
1 2
mv
2
PE g  mgh
1st determine what you need to find
2nd determine what variable each number is.
3rd determine which equation to use.
1. A cart with a mass of 4.0 kg, initially at rest, starts to roll down a
slope that is 2.0 meters high. At the bottom of the slope, the
velocity of the cart is 2.0 m/s. Assuming that energy is conserved,
what is ∆U?
4th solve the equation
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2. Henry drives a 0.500 kg spike into a rail tie with a 2.50 kg sledgehammer. The hammer hits
the spike with a speed of 65.0 m/s. If 1/3 of the hammer’s kinetic energy is converted
to the internal energy of the hammer and spike, how much does the total internal
energy increase?
3. A .003 kg copper penny drops a distance of 50.0 m to the ground. If 65 percent of the initial gravitational
potential energy goes into increasing the internal energy of the penny, determine the magnitude(amount) of
that increase.
4. The amount of internal energy needed to raise the temperature of the 0.25 kg of water by 0.2C is 209.3 J.
How fast must the famous, “Jorge Juarez” on the KC Royals in the 2016 World Series pitch a 0.25 kg
baseball, in order for its kinetic energy to equal this internal energy?
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Chapter 9 Section 2 Review, page 311
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1st determine what you need to find
These problems require the use of the formula(s)
PE  KE  U  0
KE 
1 2
mv
2
PE g  mgh
1. Use the microscopic
interpretations of temperature
and heat to explain how Rachel
can blow on your hands to warm
them and also blow on a bowl of
hot soup to cool it.
2nd determine what variable each number is.
3rd determine which equation to use.
4th solve the equation
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2. If a bottle of water is shaken by Dylan vigorously, will the internal energy of the water change? Why or why
not?
3. At Niagara Falls, if 505 kg of water falls a distance of 50.0 m, what is the increase in the internal energy of
the water at the bottom of the falls? Assume that all of the initial potential energy goes into increasing the
water’s internal energy and that the final kinetic energy is zero?
4. A bottle of water at room temperature is place in a freezer for a short time. An identical bottle of water that
has been lying in the sunlight is placed in a refrigerator for the same amount of time. What must James
know to determine which situation involves more energy transfer?
5. On a camping trip, Hanna tells Nyna that fluffing up a down sleeping bag before you go to bed will keep you
warmer than sleeping in the same bag when it is still crushed from being in its storage sack. Explain why this
happens.
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Chapter 9 Chapter Review, page 322
1. What is the relationship between temperature and internal energy?
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1st determine what you need to find
2nd determine what variable each number is.
3rd determine which equation to use.
4th solve the equation
4. What property must a substance have in order to be used for
calibrating a thermometer?
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7. Why are the steam and ice points of water better fixed points for a thermometer than the temperature of a
human body?
9. The highest recorded temperature on Earth was 136F, at Azizia, Libya, in 1922. Express this temperature in
degrees Celsius and in kelvins.
11. Which drawing below shows the direction in which net energy is transferred as heat between an ice cube
and the freezer walls when the temperature of both is -10C? Explain your answer.
More problems on the next page….
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13. How much energy is transferred between a piece of toast and an oven when both are at a temperature of
55C? Explain.
17. Why does stirring Michael’s hot cup of coffee cool it down when by stirring you are adding energy?
Side 1
Side 2
19. Explain how conduction causes water on the surface of a the middle of the bridge to freeze Juan’s shoes to
the surface sooner than water on the road surface on either ends/sides of the bridge.
24. A force of 315 N is applied horizontally to a crate in order to displace the crate 35.0 m across a level floor at
a constant velocity. As a result of this work, the crate’s internal energy is increased by an amount equal to 14
percent of the crate’s initial internal energy. Calculate the initial internal energy of the crate. (Disregard the
work done on the floor, and assume that all work goes into the crate.)
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