Question 1

If all of the liquids pictured above were the same, which setup would contain the capillary with the smallest diameter?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e D

Question 2

Which of the following would have the highest surface tension?

Accepted Answer

A) a molecule with very strong intermolecular forces 
B) a molecule with very weak intermolecular forces 
C) a molecule with a very small degree of cohesive forces 
D) a molecule with very strong adhesive forces 
E) a mixture of molecules with strong and weak adhesive forces 
A) a molecule with very strong intermolecular forces 
B) a molecule with very weak intermolecular forces 
C) a molecule with a very small degree of cohesive forces 
D) a molecule with very strong adhesive forces 
E) a mixture of molecules with strong and weak adhesive forces A

Question 3

Which of the following would cause the worst burn?

Accepted Answer

A) 1 gram of steam at 100°C 
B) 1 gram of water at 100°C 
C) 1 gram of water at 50°C 
D) 1 gram of water at 0°C 
E) 1 gram of ice at 0°C 
A) 1 gram of steam at 100°C 
B) 1 gram of water at 100°C 
C) 1 gram of water at 50°C 
D) 1 gram of water at 0°C 
E) 1 gram of ice at 0°C A

Question 4

Does soap increase or decrease water's surface tension?

Accepted Answer

A) increases 
B) decreases 
C) Soap does not affect water's surface tension. 
D) Both; adding a small amount of soap will first decrease water's surface tension but increasing the amount of soap will reverse the effect. 
A) increases 
B) decreases 
C) Soap does not affect water's surface tension. 
D) Both; adding a small amount of soap will first decrease water's surface tension but increasing the amount of soap will reverse the effect.

Question 5

Which of the above liquids has the strongest adhesive forces?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 6

Why does water expand when it goes from a liquid to a solid?

Accepted Answer

A) The water molecules become aligned in a way that creates extra volume. 
B) The liquid has a higher density than the ice. 
C) Ice molecules are bigger than water molecules. 
D) The liquid water molecules are bigger and shrink when cooled. 
E) none of the above 
A) The water molecules become aligned in a way that creates extra volume. 
B) The liquid has a higher density than the ice. 
C) Ice molecules are bigger than water molecules. 
D) The liquid water molecules are bigger and shrink when cooled. 
E) none of the above

Question 7

Why do water drops bead on a freshly waxed surface?

Accepted Answer

A) The wax, which is nonpolar, pushes the water into a bead shape. 
B) The strong cohesive forces between water molecules attract each other and the result is a sphere, which is squashed down into a bead by the force of gravity. 
C) Water's cohesive forces between molecules results in a spherical shape and prevents the water droplet from spreading out evenly over the wax. 
D) A freshly waxed surface carries a small electrical charge, which repel the outer electrons on the water molecules. 
A) The wax, which is nonpolar, pushes the water into a bead shape. 
B) The strong cohesive forces between water molecules attract each other and the result is a sphere, which is squashed down into a bead by the force of gravity. 
C) Water's cohesive forces between molecules results in a spherical shape and prevents the water droplet from spreading out evenly over the wax. 
D) A freshly waxed surface carries a small electrical charge, which repel the outer electrons on the water molecules.

Question 8

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece by 20.0°C?

Accepted Answer

A) 180 J 
B) 222 J 
C) 200 J 
D) 90 J 
E) 0.9 J 
A) 180 J 
B) 222 J 
C) 200 J 
D) 90 J 
E) 0.9 J

Question 9

Which of the following statements regarding a phase change is NOT true?

Accepted Answer

A) The amount of heat energy stays the same during a phase change. 
B) The temperature of the sample stays the same during a phase change. 
C) Heat energy is either absorbed or released during a phase change. 
D) The molecules do not change their average kinetic energy during a phase change. 
E) Molecular attractions are either overcome or formed during a phase change. 
A) The amount of heat energy stays the same during a phase change. 
B) The temperature of the sample stays the same during a phase change. 
C) Heat energy is either absorbed or released during a phase change. 
D) The molecules do not change their average kinetic energy during a phase change. 
E) Molecular attractions are either overcome or formed during a phase change.

Question 10

What happens to a soda can left in the freezer? Why?

Accepted Answer

A) The sugar and syrup, which separate from the water, settle to the bottom of the can and become solid. 
B) The soda inside the can freezes collapsing the can as the solid forms. 
C) The soda can puffs out and sometimes the lid pops open because water expands when it freezes. 
D) Although the soda inside the can get s very cold, it will not completely freeze because of the high sugar concentration. 
A) The sugar and syrup, which separate from the water, settle to the bottom of the can and become solid. 
B) The soda inside the can freezes collapsing the can as the solid forms. 
C) The soda can puffs out and sometimes the lid pops open because water expands when it freezes. 
D) Although the soda inside the can get s very cold, it will not completely freeze because of the high sugar concentration.

Question 11

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece of aluminum from 21°C to 61°C?

Accepted Answer

A) 360 J 
B) 180 J 
C) 540 J 
D) 900 J 
E) 90 J 
A) 360 J 
B) 180 J 
C) 540 J 
D) 900 J 
E) 90 J

Question 12

How does a solute such as salt or sugar affect the melting and freezing of water?

Accepted Answer

A) Solutes slow the rate of ice formation. 
B) Solutes increase the rate of ice formation. 
C) Solutes slow the rate of liquid water release from ice. 
D) Solutes increase the rate of liquid water release from ice. 
E) none of the above 
A) Solutes slow the rate of ice formation. 
B) Solutes increase the rate of ice formation. 
C) Solutes slow the rate of liquid water release from ice. 
D) Solutes increase the rate of liquid water release from ice. 
E) none of the above

Question 13

Boiling is when the ________.

Accepted Answer

A) vapor pressure of a liquid equals the atmospheric pressure 
B) rate of evaporation equals the rate of condensation 
C) material no longer undergoes condensation 
D) vapor pressure decreases to zero 
E) none of the above 
A) vapor pressure of a liquid equals the atmospheric pressure 
B) rate of evaporation equals the rate of condensation 
C) material no longer undergoes condensation 
D) vapor pressure decreases to zero 
E) none of the above

Question 14

From the diagram above describing the phase of water relative to temperature and pressure, is it possible for ice to transform to water vapor (sublime)without ever becoming liquid? At which point on the diagram does this occur?

Accepted Answer

A) No, water cannot sublime (become vapor from solid)without first becoming liquid. 
B) Yes, water can be made to sublime. This occurs at point D on the diagram. 
C) Yes, but only at the exact conditions of point B on the diagram. 
D) Yes, but the diagram does not demonstrate the action of water as "dry ice." 
A) No, water cannot sublime (become vapor from solid)without first becoming liquid. 
B) Yes, water can be made to sublime. This occurs at point D on the diagram. 
C) Yes, but only at the exact conditions of point B on the diagram. 
D) Yes, but the diagram does not demonstrate the action of water as "dry ice."

Question 15

Heat is given off by a substance when that substance ________.

Accepted Answer

A) evaporates 
B) freezes 
C) melts 
D) boils 
E) C and D 
A) evaporates 
B) freezes 
C) melts 
D) boils 
E) C and D

Question 16

Should the specific heat of your automobile's radiator fluid be as high as possible or as low as possible? Why?

Accepted Answer

A) A higher specific heat radiator fluid would be more effective at distributing the heat to different parts of the engine so it doesn't all build up in one place. 
B) A lower specific heat would mean that it is starting at a low temperature, and has to heat up to a much higher temperature before it boils away. 
C) A higher specific heat radiator fluid would be more effective at absorbing heat from the engine, so that it doesn't melt. 
D) A lower specific heat radiator fluid means that its molecules will not form a thick solution, but rather will get "thinner" as it is heated so that it won't block up the radiator. 
A) A higher specific heat radiator fluid would be more effective at distributing the heat to different parts of the engine so it doesn't all build up in one place. 
B) A lower specific heat would mean that it is starting at a low temperature, and has to heat up to a much higher temperature before it boils away. 
C) A higher specific heat radiator fluid would be more effective at absorbing heat from the engine, so that it doesn't melt. 
D) A lower specific heat radiator fluid means that its molecules will not form a thick solution, but rather will get "thinner" as it is heated so that it won't block up the radiator.

Question 17

Which of the following contains the most heat energy?

Accepted Answer

A) 1 gram of steam at 100°C 
B) 1 gram of water at 100°C 
C) 1 gram of water at 50°C 
D) 1 gram of water at 0°C 
E) 1 gram of ice at 0°C 
A) 1 gram of steam at 100°C 
B) 1 gram of water at 100°C 
C) 1 gram of water at 50°C 
D) 1 gram of water at 0°C 
E) 1 gram of ice at 0°C

Question 18

What is the boiling temperature of a single water molecule? Does this question make sense?

Accepted Answer

A) Boiling involves the separation of many molecules (plural). With only one molecule, the concept of boiling is meaningless. 
B) Yes, this question does make sense because temperature measures the average kinetic energy of a molecule, which is 100°C for water. 
C) 100°C indicates when the covalent bonds of the water molecule has been broken to give rise to hydrogen and oxygen atoms which are released into atmosphere. 
D) No, this question does not make sense because you need at least two molecules to get the average kinetic energy. 
A) Boiling involves the separation of many molecules (plural). With only one molecule, the concept of boiling is meaningless. 
B) Yes, this question does make sense because temperature measures the average kinetic energy of a molecule, which is 100°C for water. 
C) 100°C indicates when the covalent bonds of the water molecule has been broken to give rise to hydrogen and oxygen atoms which are released into atmosphere. 
D) No, this question does not make sense because you need at least two molecules to get the average kinetic energy.

Question 19

An adhesive force is best described as ________.

Accepted Answer

A) attraction between two liquid molecules 
B) attraction between a liquid molecule and a solute 
C) the force that allows for molecular adhesion 
D) the force that holds together the nucleus 
E) attraction between two different molecules 
A) attraction between two liquid molecules 
B) attraction between a liquid molecule and a solute 
C) the force that allows for molecular adhesion 
D) the force that holds together the nucleus 
E) attraction between two different molecules

Question 20

What happens when pressure is applied to ice crystals?

Accepted Answer

A) The regular arrangement of the ice is disrupted and the ice melts. 
B) The temperature rises and the ice melts. 
C) The regular arrangement of ice causes it to harden. 
D) The freezing temperature of the molecules decreases. 
E) The volume occupied by the material increases. 
A) The regular arrangement of the ice is disrupted and the ice melts. 
B) The temperature rises and the ice melts. 
C) The regular arrangement of ice causes it to harden. 
D) The freezing temperature of the molecules decreases. 
E) The volume occupied by the material increases.

If all of the liquids pictured above were the same, which setup would contain the capillary with the smallest diameter?

Which of the following would have the highest surface tension?

Which of the following would cause the worst burn?

Does soap increase or decrease water's surface tension?

Which of the above liquids has the strongest adhesive forces?

Why does water expand when it goes from a liquid to a solid?

Why do water drops bead on a freshly waxed surface?

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece by 20.0°C?

Which of the following statements regarding a phase change is NOT true?

What happens to a soda can left in the freezer? Why?

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece of aluminum from 21°C to 61°C?

How does a solute such as salt or sugar affect the melting and freezing of water?

Boiling is when the ________.

From the diagram above describing the phase of water relative to temperature and pressure, is it possible for ice to transform to water vapor (sublime)without ever becoming liquid? At which point on the diagram does this occur?

Heat is given off by a substance when that substance ________.

Should the specific heat of your automobile's radiator fluid be as high as possible or as low as possible? Why?

Which of the following contains the most heat energy?

What is the boiling temperature of a single water molecule? Does this question make sense?

An adhesive force is best described as ________.

What happens when pressure is applied to ice crystals?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

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Exam 8: How Water Behaves

If all of the liquids pictured above were the same, which setup would contain the capillary with the smallest diameter?

Which of the following would have the highest surface tension?

Which of the following would cause the worst burn?

Does soap increase or decrease water's surface tension?

Which of the above liquids has the strongest adhesive forces?

Why does water expand when it goes from a liquid to a solid?

Why do water drops bead on a freshly waxed surface?

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece by 20.0°C?

Which of the following statements regarding a phase change is NOT true?

What happens to a soda can left in the freezer? Why?

If the specific heat of aluminum is 0.90 J/(g°C), how much heat is needed to raise the temperature of a 10.0-gram piece of aluminum from 21°C to 61°C?

How does a solute such as salt or sugar affect the melting and freezing of water?

Boiling is when the ________.

From the diagram above describing the phase of water relative to temperature and pressure, is it possible for ice to transform to water vapor (sublime)without ever becoming liquid? At which point on the diagram does this occur?

Heat is given off by a substance when that substance ________.

Should the specific heat of your automobile's radiator fluid be as high as possible or as low as possible? Why?

Which of the following contains the most heat energy?

What is the boiling temperature of a single water molecule? Does this question make sense?

An adhesive force is best described as ________.

What happens when pressure is applied to ice crystals?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters