Question 1

The atmospheric pressure in Denver is 0.85 atm. What is the atmospheric pressure in torr?

Accepted Answer

A)  0.0011 torr 
B)  890 torr 
C)  650 torr 
D)  12 torr 
E)  0.058 torr 
A)  0.0011 torr 
B)  890 torr 
C)  650 torr 
D)  12 torr 
E)  0.058 torr

Question 2

An oxygen tank has a pressure of 12 atm at 295 K. The maximum pressure that the tank can hold is 25 atm. What is the maximum temperature at which the tank can be stored?

Accepted Answer

A)  610 K 
B)  590 K 
C)  350 K 
D)  140 K 
E)  0.98 K 
A)  610 K 
B)  590 K 
C)  350 K 
D)  140 K 
E)  0.98 K

Question 3

You drive your car from Salt Lake City up into the mountains to go skiing. It is a nice day in Salt Lake, with a temperature of 16F1F1F1S1F1F1F10C and an atmospheric pressure of 0.85 atm. Up in the mountains, it is freezing at F1F1F1S1F1F1F101.0F1F1F1S1F1F1F10C and an atmospheric pressure of 0.70 atm. If the volume of air in your tires is 12 L when you leave the city, what is it in the mountains?

Accepted Answer

A)  "F1F1F1S1F1F1F100.91 L" 
B)  "9.3 L" 
C)  "11 L" 
D)  "13 L" 
E)  "14 L" 
A)  "F1F1F1S1F1F1F100.91 L" 
B)  "9.3 L" 
C)  "11 L" 
D)  "13 L" 
E)  "14 L"

Question 4

Arrow A points to

Accepted Answer

A)  a polar covalent bond. 
B)  a nonpolar bond. 
C)  a dispersion force. 
D)  heat. 
E)  a hydrogen bond. 
A)  a polar covalent bond. 
B)  a nonpolar bond. 
C)  a dispersion force. 
D)  heat. 
E)  a hydrogen bond.

Question 5

Henry's law is P = kC. Which statement best describes the meaning of this law?

Accepted Answer

A)  As the pressure above a gas in solution decreases, the concentration of gas in solution increases. 
B)  As the pressure above a gas in solution increases, the concentration of gas in solution also increases. 
C)  As the pressure above a gas in solution increases, the concentration of gas in solution decreases. 
D)  As the concentration of a gas in solution increases, Henry's constant increases. 
E)  As the concentration of a gas in solution decreases, Henry's constant decreases. 
A)  As the pressure above a gas in solution decreases, the concentration of gas in solution increases. 
B)  As the pressure above a gas in solution increases, the concentration of gas in solution also increases. 
C)  As the pressure above a gas in solution increases, the concentration of gas in solution decreases. 
D)  As the concentration of a gas in solution increases, Henry's constant increases. 
E)  As the concentration of a gas in solution decreases, Henry's constant decreases.

Question 6

Which of the following are ways to increase the pressure of a gas?

Accepted Answer

A)  heating the gas 
B)  decreasing the volume of the gas by placing it into a smaller container 
C)  adding more gas molecules to the container 
D)  compressing the gas 
E)  All of the above 
A)  heating the gas 
B)  decreasing the volume of the gas by placing it into a smaller container 
C)  adding more gas molecules to the container 
D)  compressing the gas 
E)  All of the above

Question 7

What change of phase is represented by B on the heating curve?

Accepted Answer

A)  boiling 
B)  freezing 
C)  sublimating 
D)  melting 
E)  It is not possible to determine what will happen to the temperature of the liquid by looking at the chart. 
A)  boiling 
B)  freezing 
C)  sublimating 
D)  melting 
E)  It is not possible to determine what will happen to the temperature of the liquid by looking at the chart.

Question 8

In which of the following statements is the gas variable correctly described?

Accepted Answer

A)  Temperature is a measure of the space occupied by a gas. 
B)  Volume increases as the collisions of gas particles with the walls of the container increases. 
C)  Temperature is related to the average speed of gas particles. 
D)  The number of moles of a gas decreases as the volume of the gas increases. 
E)  When gas particles move faster, the pressure of the gas must increase. 
A)  Temperature is a measure of the space occupied by a gas. 
B)  Volume increases as the collisions of gas particles with the walls of the container increases. 
C)  Temperature is related to the average speed of gas particles. 
D)  The number of moles of a gas decreases as the volume of the gas increases. 
E)  When gas particles move faster, the pressure of the gas must increase.

Question 9

Which of the following changes is not correctly labeled as a chemical reaction or a change of state?

Accepted Answer

A)  rust forming on metal, a chemical reaction. 
B)  steam coming off of a cup of coffee, a change of state. 
C)  an ice cube melting in a drink, a change of state 
D)  the combustion of gasoline to give carbon dioxide and water, a chemical reaction 
E)  bubbles forming in a just opened can of soda, a chemical reaction 
A)  rust forming on metal, a chemical reaction. 
B)  steam coming off of a cup of coffee, a change of state. 
C)  an ice cube melting in a drink, a change of state 
D)  the combustion of gasoline to give carbon dioxide and water, a chemical reaction 
E)  bubbles forming in a just opened can of soda, a chemical reaction

Question 10

What happens to acetone when it is boiled?

Accepted Answer

A)  More intermolecular forces are formed. 
B)  The nonpolar covalent bonds are broken. 
C)  The polar covalent bonds are broken. 
D)  All bonds in the molecule are broken. 
E)  The intermolecular forces are broken. 
A)  More intermolecular forces are formed. 
B)  The nonpolar covalent bonds are broken. 
C)  The polar covalent bonds are broken. 
D)  All bonds in the molecule are broken. 
E)  The intermolecular forces are broken.

Question 11

How does the pressure of a gas change when it is compressed?

Accepted Answer

A)  It will not change because there is no relationship between volume and pressure. 
B)  It will increase because P1V1 = P2V2. 
C)  It will decrease because P1V1 = P2V2. 
D)  It will increase because P1/V1 = P2/V2. 
E)  It will decrease because P1/V1 = P2/V2. 
A)  It will not change because there is no relationship between volume and pressure. 
B)  It will increase because P1V1 = P2V2. 
C)  It will decrease because P1V1 = P2V2. 
D)  It will increase because P1/V1 = P2/V2. 
E)  It will decrease because P1/V1 = P2/V2.

Question 12

Why must a SCUBA diver ascend slowly from a dive?

Accepted Answer

A)  to conserve air 
B)  to avoid the formation of nitrogen bubbles in the bloodstream 
C)  to avoid breathlessness 
D)  to allow time to change air tanks 
E)  There is no reason to ascend slowly from a dive. 
A)  to conserve air 
B)  to avoid the formation of nitrogen bubbles in the bloodstream 
C)  to avoid breathlessness 
D)  to allow time to change air tanks 
E)  There is no reason to ascend slowly from a dive.

Question 13

You are riding your bike and run over a thorn, puncturing your tire. The air in the tire is released, resulting in a flat. What is the relationship between the volume (Vi) and moles of air (ni) in the inflated tire and the volume (Vf) and moles of air in the flat tire (nf)?

Accepted Answer

A)    
B)    
C)    
D)    
E)  There is no relationship between the moles of air and the volume of air in the tire. 
A)    
B)    
C)    
D)    
E)  There is no relationship between the moles of air and the volume of air in the tire.

Question 14

According to Avogadro's Law, What is the meaning of this law?

Accepted Answer

A)  Adding moles of gas decreases the volume of the gas. 
B)  Adding moles of gas increases the volume of the gas. 
C)  The volume is inversely proportional to the moles of air. 
D)  Gas particles shrink when they are crowded. 
E)  Gas particles expand when they are crowded. 
A)  Adding moles of gas decreases the volume of the gas. 
B)  Adding moles of gas increases the volume of the gas. 
C)  The volume is inversely proportional to the moles of air. 
D)  Gas particles shrink when they are crowded. 
E)  Gas particles expand when they are crowded.

Question 15

Which process requires more energy per gram: melting ice or boiling water?

Accepted Answer

A)  They both require the same amount of energy because both processes involve breaking intermolecular forces. 
B)  Melting ice takes more energy because more intermolecular forces are broken. 
C)  Boiling water takes more energy because more intermolecular forces are broken. 
D)  Melting ice takes more energy because it occurs at 0F1F1F1S1F1F1F10C instead of 100F1F1F1S1F1F1F10C. 
E)  The energy of these processes has never been compared. 
A)  They both require the same amount of energy because both processes involve breaking intermolecular forces. 
B)  Melting ice takes more energy because more intermolecular forces are broken. 
C)  Boiling water takes more energy because more intermolecular forces are broken. 
D)  Melting ice takes more energy because it occurs at 0F1F1F1S1F1F1F10C instead of 100F1F1F1S1F1F1F10C. 
E)  The energy of these processes has never been compared.

Question 16

A narrow tube on a road bike should be inflated to about 100 psi. What is this pressure in atmospheres?

Accepted Answer

A)  0.1 atm 
B)  0.5 atm 
C)  7 atm 
D)  1000 atm 
E)  2 F1F1F1S1F1F1F10 105 atm 
A)  0.1 atm 
B)  0.5 atm 
C)  7 atm 
D)  1000 atm 
E)  2 F1F1F1S1F1F1F10 105 atm

Question 17

Which of the following statements best describes vapor pressure?

Accepted Answer

A)  Vapor pressure is the pressure of a gas at room temperature. 
B)  Vapor pressure is the pressure of a liquid at room temperature. 
C)  Vapor pressure is a measure of the strength of a substance's odor. 
D)  Vapor pressure is a measure of a material's boiling point. 
E)  Vapor pressure is the pressure of the vapor above a liquid or solid. 
A)  Vapor pressure is the pressure of a gas at room temperature. 
B)  Vapor pressure is the pressure of a liquid at room temperature. 
C)  Vapor pressure is a measure of the strength of a substance's odor. 
D)  Vapor pressure is a measure of a material's boiling point. 
E)  Vapor pressure is the pressure of the vapor above a liquid or solid.

Question 18

Balloon A is placed into a container that has a higher pressure than atmospheric pressure. Which balloon would you predict to be the new size of balloon A?

Accepted Answer

A)  balloon B 
B)  balloon C 
C)  balloon D 
D)  either balloon B or D 
E)  either balloon B or C 
A)  balloon B 
B)  balloon C 
C)  balloon D 
D)  either balloon B or D 
E)  either balloon B or C

Question 19

What occurs over the course of this physical change illustrated below?

Accepted Answer

A)  Hydrogen bonds are broken. 
B)  Hydrogen bonds are formed. 
C)  Polar covalent bonds are broken. 
D)  Polar covalent bonds are formed. 
E)  Both hydrogen bonds and polar covalent bonds are broken. 
A)  Hydrogen bonds are broken. 
B)  Hydrogen bonds are formed. 
C)  Polar covalent bonds are broken. 
D)  Polar covalent bonds are formed. 
E)  Both hydrogen bonds and polar covalent bonds are broken.

Question 20

Which statement best describes how heat is involved in the change in the diagram below?

Accepted Answer

A)  Heat energy breaks the intermolecular forces holding molecules of water together. 
B)  Heat energy is released from intermolecular forces as the molecules of water break apart. 
C)  Heat energy breaks the covalent bonds holding molecules of water together. 
D)  Heat energy is released from covalent bonds as the molecules of water break apart. 
E)  Heat energy is not involved in this change. 
A)  Heat energy breaks the intermolecular forces holding molecules of water together. 
B)  Heat energy is released from intermolecular forces as the molecules of water break apart. 
C)  Heat energy breaks the covalent bonds holding molecules of water together. 
D)  Heat energy is released from covalent bonds as the molecules of water break apart. 
E)  Heat energy is not involved in this change.

The atmospheric pressure in Denver is 0.85 atm. What is the atmospheric pressure in torr?

An oxygen tank has a pressure of 12 atm at 295 K. The maximum pressure that the tank can hold is 25 atm. What is the maximum temperature at which the tank can be stored?

Arrow A points to

Henry's law is P = kC. Which statement best describes the meaning of this law?

Which of the following are ways to increase the pressure of a gas?

What change of phase is represented by B on the heating curve?

In which of the following statements is the gas variable correctly described?

Which of the following changes is not correctly labeled as a chemical reaction or a change of state?

What happens to acetone when it is boiled?

How does the pressure of a gas change when it is compressed?

Why must a SCUBA diver ascend slowly from a dive?

You are riding your bike and run over a thorn, puncturing your tire. The air in the tire is released, resulting in a flat. What is the relationship between the volume (V_i) and moles of air (n_i) in the inflated tire and the volume (V_f) and moles of air in the flat tire (n_f)?

According to Avogadro's Law, What is the meaning of this law?

Which process requires more energy per gram: melting ice or boiling water?

A narrow tube on a road bike should be inflated to about 100 psi. What is this pressure in atmospheres?

Which of the following statements best describes vapor pressure?

Balloon A is placed into a container that has a higher pressure than atmospheric pressure. Which balloon would you predict to be the new size of balloon A?

What occurs over the course of this physical change illustrated below?

Which statement best describes how heat is involved in the change in the diagram below?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 5: Changes of State and the Gas Laws

The atmospheric pressure in Denver is 0.85 atm. What is the atmospheric pressure in torr?

An oxygen tank has a pressure of 12 atm at 295 K. The maximum pressure that the tank can hold is 25 atm. What is the maximum temperature at which the tank can be stored?

Arrow A points to

Henry's law is P = kC. Which statement best describes the meaning of this law?

Which of the following are ways to increase the pressure of a gas?

What change of phase is represented by B on the heating curve?

In which of the following statements is the gas variable correctly described?

Which of the following changes is not correctly labeled as a chemical reaction or a change of state?

What happens to acetone when it is boiled?

How does the pressure of a gas change when it is compressed?

Why must a SCUBA diver ascend slowly from a dive?

You are riding your bike and run over a thorn, puncturing your tire. The air in the tire is released, resulting in a flat. What is the relationship between the volume (Vi) and moles of air (ni) in the inflated tire and the volume (Vf) and moles of air in the flat tire (nf)?

According to Avogadro's Law, What is the meaning of this law?

Which process requires more energy per gram: melting ice or boiling water?

A narrow tube on a road bike should be inflated to about 100 psi. What is this pressure in atmospheres?

Which of the following statements best describes vapor pressure?

Balloon A is placed into a container that has a higher pressure than atmospheric pressure. Which balloon would you predict to be the new size of balloon A?

What occurs over the course of this physical change illustrated below?

Which statement best describes how heat is involved in the change in the diagram below?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

You are riding your bike and run over a thorn, puncturing your tire. The air in the tire is released, resulting in a flat. What is the relationship between the volume (V_i) and moles of air (n_i) in the inflated tire and the volume (V_f) and moles of air in the flat tire (n_f)?