Question 1

A great deal of heat is released when liquid water freezes. Why doesn't this heat simply remelt the ice?

Accepted Answer

A)  Once the water is in crystalline formation, it takes even more energy to melt it. 
B)  This heat is radiated outwards to the environment, rather than back into the ice. 
C)  The heat is not concentrated enough to melt ice. 
D)  There is not enough energy in the heat to melt ice. 
A)  Once the water is in crystalline formation, it takes even more energy to melt it. 
B)  This heat is radiated outwards to the environment, rather than back into the ice. 
C)  The heat is not concentrated enough to melt ice. 
D)  There is not enough energy in the heat to melt ice.

Question 2

Why does liquid water expand slightly when cooled from 4°C to 2°C?

Accepted Answer

A)  The molecules vibrate faster and the molecules move farther apart. 
B)  The molecules vibrate faster and the molecules move closer together. 
C)  The molecules vibrate slower and the molecules move farther apart as hydrogen bonds form. 
D)  The molecules vibrate slower and the molecules move closer together as hydrogen bonds form. 
E)  none of the above 
A)  The molecules vibrate faster and the molecules move farther apart. 
B)  The molecules vibrate faster and the molecules move closer together. 
C)  The molecules vibrate slower and the molecules move farther apart as hydrogen bonds form. 
D)  The molecules vibrate slower and the molecules move closer together as hydrogen bonds form. 
E)  none of the above

Question 3

Why does condensation have a tendency to raise the temperature of a liquid?

Accepted Answer

A)  Water vapor molecules absorb kinetic energy when they slow and form liquid water. 
B)  Because the liquid water absorbs the water vapor molecules. 
C)  Condensation leads to slow moving molecules. 
D)  Hydrogen bonding leads to a increase in the overall amount of kinetic energy in the water vapor. 
E)  none of the above 
A)  Water vapor molecules absorb kinetic energy when they slow and form liquid water. 
B)  Because the liquid water absorbs the water vapor molecules. 
C)  Condensation leads to slow moving molecules. 
D)  Hydrogen bonding leads to a increase in the overall amount of kinetic energy in the water vapor. 
E)  none of the above

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

Condensation is ________.

Accepted Answer

A)  always a cooling process 
B)  sometimes a cooling process 
C)  always a warming process 
D)  sometimes a warming process 
E)  Two of the above are correct. 
A)  always a cooling process 
B)  sometimes a cooling process 
C)  always a warming process 
D)  sometimes a warming process 
E)  Two of the above are correct.

Question 6

Ice floats in room temperature water, but does it float in boiling water? Why or why not?

Accepted Answer

A)  As liquid water heats up and boils, it will become less dense, therefore the ice will sink. 
B)  As water cools, it becomes more dense. When it freezes however, it becomes less dense as it forms ice crystals. Therefore, it will sink in boiling water, but float in water at room temperature. 
C)  It is impossible to have ice in boiling water. 
D)  If boiling water is less dense than ice, the ice cube should sink. 
A)  As liquid water heats up and boils, it will become less dense, therefore the ice will sink. 
B)  As water cools, it becomes more dense. When it freezes however, it becomes less dense as it forms ice crystals. Therefore, it will sink in boiling water, but float in water at room temperature. 
C)  It is impossible to have ice in boiling water. 
D)  If boiling water is less dense than ice, the ice cube should sink.

Question 7

Can a glass be filled to above its brim with water without the water spilling over the edge?

Accepted Answer

A)  Yes, due to the strong cohesive forces between water molecules. 
B)  Yes, due to the strong adhesive forces between water molecules. 
C)  Yes, due to the strong cohesive forces of gravity keeping the water in the cup. 
D)  No, it is just an optical illusion because water magnetizes things. 
A)  Yes, due to the strong cohesive forces between water molecules. 
B)  Yes, due to the strong adhesive forces between water molecules. 
C)  Yes, due to the strong cohesive forces of gravity keeping the water in the cup. 
D)  No, it is just an optical illusion because water magnetizes things.

Question 8

Describe what happens to an ice cube and some water at 0°C if you increase the rate of water formation?

Accepted Answer

A)  The ice cube melts. 
B)  Nothing, ice and water at 0°C is stable indefinitely. 
C)  The ice cube increases in size. 
D)  The rate of ice formation also increases. 
E)  none of the above 
A)  The ice cube melts. 
B)  Nothing, ice and water at 0°C is stable indefinitely. 
C)  The ice cube increases in size. 
D)  The rate of ice formation also increases. 
E)  none of the above

Question 9

Why does water have a high specific heat?

Accepted Answer

A)  Much of the added energy is required to break hydrogen bonds. 
B)  Water is not very dense like metals and therefore doesn't conduct heat as readily. 
C)  Much of the heat that is added to water is converted to kinetic energy. 
D)  None of the energy is stored as potential energy. 
E)  none of the above 
A)  Much of the added energy is required to break hydrogen bonds. 
B)  Water is not very dense like metals and therefore doesn't conduct heat as readily. 
C)  Much of the heat that is added to water is converted to kinetic energy. 
D)  None of the energy is stored as potential energy. 
E)  none of the above

Question 10

Which of the following contains the least 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 11

How much heat is required to raise the temperature of 1.00 gram of water from absolute zero,   , to   ?

Accepted Answer

A)  1.30 ×   joules 
B)  373 joules 
C)  1.56 ×   joules 
D)  2.26 ×   joules 
A)  1.30 ×   joules 
B)  373 joules 
C)  1.56 ×   joules 
D)  2.26 ×   joules

Question 12

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.

Question 13

If the winds at the latitude of San Francisco and Washington, D.C., were from the east rather than from the west, why might San Francisco be able to grow cherry trees and Washington, D.C. palm trees?

Accepted Answer

A)  The warm winds from Hawaii would stop blowing over San Francisco, giving it a cooler climate. The warm winds from Bermuda would warm up Washington, D.C. 
B)  Cherries need a dryer climate, such as the winds from Nevada, and palm trees need moister air, which would come from the Atlantic ocean. 
C)  The evaporation of water gives off heat, which would keep Washington, D.C. warm if the Atlantic winds blew eastward. This effect on the climate would be lost if the winds changed direction in San Francisco. 
D)  As the ocean off the west coast cools in the winter, the heat it loses warms the air that blows over San Francisco warming its climate. If the winds were from the east, this same effect would keep Washington, D.C. warm with its surrounding ocean, and San Francisco would only have the cool winds of Nevada determining its temperatures. 
A)  The warm winds from Hawaii would stop blowing over San Francisco, giving it a cooler climate. The warm winds from Bermuda would warm up Washington, D.C. 
B)  Cherries need a dryer climate, such as the winds from Nevada, and palm trees need moister air, which would come from the Atlantic ocean. 
C)  The evaporation of water gives off heat, which would keep Washington, D.C. warm if the Atlantic winds blew eastward. This effect on the climate would be lost if the winds changed direction in San Francisco. 
D)  As the ocean off the west coast cools in the winter, the heat it loses warms the air that blows over San Francisco warming its climate. If the winds were from the east, this same effect would keep Washington, D.C. warm with its surrounding ocean, and San Francisco would only have the cool winds of Nevada determining its temperatures.

Question 14

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 15

Which of the following statements describes what happens when a given mass of a liquid starts to expand?

Accepted Answer

A)  Its density decreases. 
B)  Its density increases. 
C)  Its density does not change. 
D)  Its mass increases. 
E)  Its volume decreases. 
A)  Its density decreases. 
B)  Its density increases. 
C)  Its density does not change. 
D)  Its mass increases. 
E)  Its volume decreases.

Question 16

It easier to cool off on a dry day vs. a humid day because the rate of evaporation is ________.

Accepted Answer

A)  greater on a dry day and more heat is lost 
B)  slower on a dry day and more heat is lost 
C)  slower on a dry day and less heat is lost 
D)  greater on a dry day and less heat is lost 
E)  none of the above 
A)  greater on a dry day and more heat is lost 
B)  slower on a dry day and more heat is lost 
C)  slower on a dry day and less heat is lost 
D)  greater on a dry day and less heat is lost 
E)  none of the above

Question 17

If you keep a mixture of water and ice at 0°C what will happen?

Accepted Answer

A)  Nothing, the ice and water will stay the same. 
B)  The water will freeze and become ice. 
C)  The ice will melt and become water. 
D)  The water will dissolve the ice. 
E)  The ice will absorb the water. 
A)  Nothing, the ice and water will stay the same. 
B)  The water will freeze and become ice. 
C)  The ice will melt and become water. 
D)  The water will dissolve the ice. 
E)  The ice will absorb the water.

Question 18

When you increase the temperature of a substance, the molecules vibrate ________.

Accepted Answer

A)  faster and the molecules move farther apart 
B)  faster and the molecules more closer together 
C)  slower and the molecules move farther apart 
D)  slower and the molecules move closer together 
E)  none of the above 
A)  faster and the molecules move farther apart 
B)  faster and the molecules more closer together 
C)  slower and the molecules move farther apart 
D)  slower and the molecules move closer together 
E)  none of the above

Question 19

The formation of hydrogen bonds between water molecules ________.

Accepted Answer

A)  leads to the formation of ice 
B)  releases heat energy 
C)  increases the amount of molecular vibration 
D)  causes ice to melt and form water 
E)  makes molecules move farther apart 
A)  leads to the formation of ice 
B)  releases heat energy 
C)  increases the amount of molecular vibration 
D)  causes ice to melt and form water 
E)  makes molecules move farther apart

Question 20

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."

A great deal of heat is released when liquid water freezes. Why doesn't this heat simply remelt the ice?

Why does liquid water expand slightly when cooled from 4°C to 2°C?

Why does condensation have a tendency to raise the temperature of a liquid?

Does soap increase or decrease water's surface tension?

Condensation is ________.

Ice floats in room temperature water, but does it float in boiling water? Why or why not?

Can a glass be filled to above its brim with water without the water spilling over the edge?

Describe what happens to an ice cube and some water at 0°C if you increase the rate of water formation?

Why does water have a high specific heat?

Which of the following contains the least heat energy?

How much heat is required to raise the temperature of 1.00 gram of water from absolute zero, , to ?

What happens when pressure is applied to ice crystals?

If the winds at the latitude of San Francisco and Washington, D.C., were from the east rather than from the west, why might San Francisco be able to grow cherry trees and Washington, D.C. palm trees?

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

Which of the following statements describes what happens when a given mass of a liquid starts to expand?

It easier to cool off on a dry day vs. a humid day because the rate of evaporation is ________.

If you keep a mixture of water and ice at 0°C what will happen?

When you increase the temperature of a substance, the molecules vibrate ________.

The formation of hydrogen bonds between water molecules ________.

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?

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

A great deal of heat is released when liquid water freezes. Why doesn't this heat simply remelt the ice?

Why does liquid water expand slightly when cooled from 4°C to 2°C?

Why does condensation have a tendency to raise the temperature of a liquid?

Does soap increase or decrease water's surface tension?

Condensation is ________.

Ice floats in room temperature water, but does it float in boiling water? Why or why not?

Can a glass be filled to above its brim with water without the water spilling over the edge?

Describe what happens to an ice cube and some water at 0°C if you increase the rate of water formation?

Why does water have a high specific heat?

Which of the following contains the least heat energy?

How much heat is required to raise the temperature of 1.00 gram of water from absolute zero, , to ?

What happens when pressure is applied to ice crystals?

If the winds at the latitude of San Francisco and Washington, D.C., were from the east rather than from the west, why might San Francisco be able to grow cherry trees and Washington, D.C. palm trees?

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

Which of the following statements describes what happens when a given mass of a liquid starts to expand?

It easier to cool off on a dry day vs. a humid day because the rate of evaporation is ________.

If you keep a mixture of water and ice at 0°C what will happen?

When you increase the temperature of a substance, the molecules vibrate ________.

The formation of hydrogen bonds between water molecules ________.

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?

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