Question 1

Which of the above liquids would most likely have the greatest capillary action?

Accepted Answer

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

Question 2

Why can you determine wind direction by wetting your finger and holding it up in the air?

Accepted Answer

A)  Wind carries water molecules, so you can sense the water molecules condensing on the side of your finger that faces the wind. 
B)  The wind hitting your finger cools the water down, slowing down evaporation. So the cooler side of your finger is windward. 
C)  When a wet finger is held to the wind, evaporation is greatest on the windy side, which feels cool. The cool side of your finger is windward. 
D)  Wind direction cannot be determined by wetting your finger because evaporation will occur evenly over the wetted finger. 
A)  Wind carries water molecules, so you can sense the water molecules condensing on the side of your finger that faces the wind. 
B)  The wind hitting your finger cools the water down, slowing down evaporation. So the cooler side of your finger is windward. 
C)  When a wet finger is held to the wind, evaporation is greatest on the windy side, which feels cool. The cool side of your finger is windward. 
D)  Wind direction cannot be determined by wetting your finger because evaporation will occur evenly over the wetted finger.

Question 3

Why does blowing over hot soup cool the soup?

Accepted Answer

A)  When you blow over the top of a bowl of hot soup, you remove the warm vapor which tends to condense and reduce net evaporation above the bowl 
B)  When you blow over the top of a bowl of hot soup, the moving air reduces pressure atop the soup and increases the rate of evaporation. 
C)  When you blow over the top of a bowl of hot soup, you increase net evaporation. 
D)  all of the above 
A)  When you blow over the top of a bowl of hot soup, you remove the warm vapor which tends to condense and reduce net evaporation above the bowl 
B)  When you blow over the top of a bowl of hot soup, the moving air reduces pressure atop the soup and increases the rate of evaporation. 
C)  When you blow over the top of a bowl of hot soup, you increase net evaporation. 
D)  all of the above

Question 4

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

Question 5

If you add heat energy to water molecules in the form of ice, where does the energy go?

Accepted Answer

A)  The energy is used to break hydrogen bonds. 
B)  Energy is neither created nor destroyed. 
C)  The energy is used to make hydrogen bonds. 
D)  Energy causes the molecules to arrange in regular arrays. 
E)  none of the above 
A)  The energy is used to break hydrogen bonds. 
B)  Energy is neither created nor destroyed. 
C)  The energy is used to make hydrogen bonds. 
D)  Energy causes the molecules to arrange in regular arrays. 
E)  none of the above

Question 6

If Earth's oceans were fresh water, would fluctuations in global temperatures be more or less pronounced?

Accepted Answer

A)  If the oceans were fresh water, fluctuations in global temperatures would be much more pronounced as can be witnessed by the melting of the polar ice caps to fresh water. 
B)  If the oceans were fresh water, the oceans' specific heats would be greater and this would help towards moderating global temperatures. 
C)  Fluctuations in global temperatures are not dependent on the ocean being salt water rather than fresh water. 
D)  If the oceans were fresh water, both their densities and specific heats would decrease, thus having a more pronounced effect on fluctuations in global temperatures. 
A)  If the oceans were fresh water, fluctuations in global temperatures would be much more pronounced as can be witnessed by the melting of the polar ice caps to fresh water. 
B)  If the oceans were fresh water, the oceans' specific heats would be greater and this would help towards moderating global temperatures. 
C)  Fluctuations in global temperatures are not dependent on the ocean being salt water rather than fresh water. 
D)  If the oceans were fresh water, both their densities and specific heats would decrease, thus having a more pronounced effect on fluctuations in global temperatures.

Question 7

How does the combined volume of the billions and billions of hexagonal open spaces in the structures of ice crystals in a piece of ice compare to the portion of ice that floats above the water line?

Accepted Answer

A)  They are the same. 
B)  The volume of the open spaces is greater than the volume that extends above water. 
C)  The volume of the open space is less than the volume that extends above water. 
D)  The volumes are not related to each other. 
A)  They are the same. 
B)  The volume of the open spaces is greater than the volume that extends above water. 
C)  The volume of the open space is less than the volume that extends above water. 
D)  The volumes are not related to each other.

Question 8

Given the following specific heats, which would require the greatest amount of heat energy to increase its temperature by 50°C?

Accepted Answer

A)  one gram of ammonia, 4.70 J/(g°
C)  
B)  Two grams of water, 4.184 J/(g°
C)  
C)  Six grams of aluminum, 0.90 J/(g°
C)  
D)  Twenty grams of silver, 0.24 J/(g°
C)  
E)  All of the above require the same amount of heat energy. 
A)  one gram of ammonia, 4.70 J/(g°
C)  
B)  Two grams of water, 4.184 J/(g°
C)  
C)  Six grams of aluminum, 0.90 J/(g°
C)  
D)  Twenty grams of silver, 0.24 J/(g°
C)  
E)  All of the above require the same amount of heat energy.

Question 9

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 10

Surface tension is the ________.

Accepted Answer

A)  tendency for molecules at the surface of a liquid to hold together 
B)  rate at which molecules move into and out of the surface of a liquid 
C)  tendency for a molecule to pack into spherical shapes 
D)  tendency for the adhesive forces of a molecule to overcome the cohesive forces 
E)  none of the above 
A)  tendency for molecules at the surface of a liquid to hold together 
B)  rate at which molecules move into and out of the surface of a liquid 
C)  tendency for a molecule to pack into spherical shapes 
D)  tendency for the adhesive forces of a molecule to overcome the cohesive forces 
E)  none of the above

Question 11

Given the following specific heats and that each sample had the same mass, which of the following materials would cool the fastest?

Accepted Answer

A)  ammonia, 4.70 J/(g°
C)  
B)  water, 4.184 J/(g°
C)  
C)  aluminum, 0.90 J/(g°
C)  
D)  silver, 0.24 J/(g°
C)  
E)  All cool at the same rate. 
A)  ammonia, 4.70 J/(g°
C)  
B)  water, 4.184 J/(g°
C)  
C)  aluminum, 0.90 J/(g°
C)  
D)  silver, 0.24 J/(g°
C)  
E)  All cool at the same rate.

Question 12

If all of the capillaries pictured above were the same size diameter, which would contain the liquid with the greatest capillary action?

Accepted Answer

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

Question 13

Water is most dense at ________.

Accepted Answer

A)  -4°C 
B)  0°C 
C)  +4°C 
D)  +100°C 
A)  -4°C 
B)  0°C 
C)  +4°C 
D)  +100°C

Question 14

A cohesive force is best described as the ________.

Accepted Answer

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

Question 15

Why is condensation a warming process? What does condensation warm?

Accepted Answer

A)  Condensation transfers slower, lower kinetic energy vapor molecules to the liquid state, thus raising the overall temperature of both the gas and liquid molecules in the process. 
B)  Condensation transfers the faster, higher kinetic energy vapor molecules to the liquid state, thus imparting the excess energy to the liquid and raising its temperature. 
C)  From a kinetic energy standpoint, we refer to condensation as a warming process. However, only the vapor molecules are losing energy and imparting that energy to the liquid, so only the liquid is warmed. 
D)  Condensation cools the vapor and warms the liquid phase. Since the process is always defined by the product, condensation is called a warming process. 
A)  Condensation transfers slower, lower kinetic energy vapor molecules to the liquid state, thus raising the overall temperature of both the gas and liquid molecules in the process. 
B)  Condensation transfers the faster, higher kinetic energy vapor molecules to the liquid state, thus imparting the excess energy to the liquid and raising its temperature. 
C)  From a kinetic energy standpoint, we refer to condensation as a warming process. However, only the vapor molecules are losing energy and imparting that energy to the liquid, so only the liquid is warmed. 
D)  Condensation cools the vapor and warms the liquid phase. Since the process is always defined by the product, condensation is called a warming process.

Question 16

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

Question 17

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 18

Why does sweat cool you off?

Accepted Answer

A)  The water molecules leaving the skin as vapor absorb the heat from your skin. 
B)  The sweat glands require energy to produce water. 
C)  The water molecules absorb the heat in your skin. 
D)  Sweat has a large amount of kinetic energy and that makes it easy to evaporate. 
E)  none of the above 
A)  The water molecules leaving the skin as vapor absorb the heat from your skin. 
B)  The sweat glands require energy to produce water. 
C)  The water molecules absorb the heat in your skin. 
D)  Sweat has a large amount of kinetic energy and that makes it easy to evaporate. 
E)  none of the above

Question 19

Why does soap decrease the surface tension of of water?

Accepted Answer

A)  It keeps water molecules away from the surface. 
B)  It increases the capillary action of the water. 
C)  It increases the ionic content of the water. 
D)  It decreases the amount of intermolecular attraction between the water molecules. 
E)  none of the above 
A)  It keeps water molecules away from the surface. 
B)  It increases the capillary action of the water. 
C)  It increases the ionic content of the water. 
D)  It decreases the amount of intermolecular attraction between the water molecules. 
E)  none of the above

Question 20

By how much will the temperature of 5.0 grams of water increase upon the addition of 230 joules of heat?

Accepted Answer

A)  46°C 
B)  11°C 
C)  5.6°C 
D)  14°C 
A)  46°C 
B)  11°C 
C)  5.6°C 
D)  14°C

Which of the above liquids would most likely have the greatest capillary action?

Why can you determine wind direction by wetting your finger and holding it up in the air?

Why does blowing over hot soup cool the soup?

Which of the following would cause the worst burn?

If you add heat energy to water molecules in the form of ice, where does the energy go?

If Earth's oceans were fresh water, would fluctuations in global temperatures be more or less pronounced?

How does the combined volume of the billions and billions of hexagonal open spaces in the structures of ice crystals in a piece of ice compare to the portion of ice that floats above the water line?

Given the following specific heats, which would require the greatest amount of heat energy to increase its temperature by 50°C?

Why do water drops bead on a freshly waxed surface?

Surface tension is the ________.

Given the following specific heats and that each sample had the same mass, which of the following materials would cool the fastest?

If all of the capillaries pictured above were the same size diameter, which would contain the liquid with the greatest capillary action?

Water is most dense at ________.

A cohesive force is best described as the ________.

Why is condensation a warming process? What does condensation warm?

Which of the following would have the highest surface tension?

Which of the above liquids has the strongest adhesive forces?

Why does sweat cool you off?

Why does soap decrease the surface tension of of water?

By how much will the temperature of 5.0 grams of water increase upon the addition of 230 joules of heat?

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

Exam 8: How Water Behaves

Which of the above liquids would most likely have the greatest capillary action?

Why can you determine wind direction by wetting your finger and holding it up in the air?

Why does blowing over hot soup cool the soup?

Which of the following would cause the worst burn?

If you add heat energy to water molecules in the form of ice, where does the energy go?

If Earth's oceans were fresh water, would fluctuations in global temperatures be more or less pronounced?

How does the combined volume of the billions and billions of hexagonal open spaces in the structures of ice crystals in a piece of ice compare to the portion of ice that floats above the water line?

Given the following specific heats, which would require the greatest amount of heat energy to increase its temperature by 50°C?

Why do water drops bead on a freshly waxed surface?

Surface tension is the ________.

Given the following specific heats and that each sample had the same mass, which of the following materials would cool the fastest?

If all of the capillaries pictured above were the same size diameter, which would contain the liquid with the greatest capillary action?

Water is most dense at ________.

A cohesive force is best described as the ________.

Why is condensation a warming process? What does condensation warm?

Which of the following would have the highest surface tension?

Which of the above liquids has the strongest adhesive forces?

Why does sweat cool you off?

Why does soap decrease the surface tension of of water?

By how much will the temperature of 5.0 grams of water increase upon the addition of 230 joules of heat?

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