Question 1

What is the significance of the magnitude of the van der Waals "a" constant?

Accepted Answer

The magnitude of the van der W

Question 2

For a gas obeying Boyle's law, a plot of V versus 1/P will give a straight line passing through the origin.

Accepted Answer

A) True 
 B)False

Question 3

Assuming ideal behavior, what is the density of argon gas at STP? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  0.0176 g/L 
B)  0.0250 g/L 
C)  0.0561 g/L 
D)  1.78 g/L 
E)  181 g/L 
A)  0.0176 g/L 
B)  0.0250 g/L 
C)  0.0561 g/L 
D)  1.78 g/L 
E)  181 g/L

Question 4

What is the volume occupied by 35.2 g of methane gas (CH4) at 25°C and 1.0 atm? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  0.0186 L 
B)  4.5 L 
C)  11.2 L 
D)  49.2 L 
E)  53.7 L 
A)  0.0186 L 
B)  4.5 L 
C)  11.2 L 
D)  49.2 L 
E)  53.7 L

Question 5

The temperature of the carbon dioxide atmosphere near the surface of Venus is 475°C. Calculate the average kinetic energy per mole of carbon dioxide molecules on Venus.

Accepted Answer

A)  2520 J/mol 
B)  4150 J/mol 
C)  5920 J/mol 
D)  9330 J/mol 
E)  5920 kJ/mol 
A)  2520 J/mol 
B)  4150 J/mol 
C)  5920 J/mol 
D)  9330 J/mol 
E)  5920 kJ/mol

Question 6

Starting from the ideal gas equation, derive an equation corresponding to Charles's law, stating all important assumptions or conditions.

Accepted Answer

The ideal gas equation is PV = nRT. Char

Question 7

At very high pressures (~1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because

Accepted Answer

A)  such high pressures cannot be accurately measured. 
B)  real gases will condense to form liquids at 1000 atm pressure. 
C)  gas phase collisions prevent molecules from colliding with the walls of the container. 
D)  of attractive intermolecular forces between gas molecules. 
E)  the volume occupied by the gas molecules themselves becomes significant. 
A)  such high pressures cannot be accurately measured. 
B)  real gases will condense to form liquids at 1000 atm pressure. 
C)  gas phase collisions prevent molecules from colliding with the walls of the container. 
D)  of attractive intermolecular forces between gas molecules. 
E)  the volume occupied by the gas molecules themselves becomes significant.

Question 8

What is the formula which describes the relationship between the pressure and volume at constant temperature and constant number of moles?

Accepted Answer

A)  PV = k1 
B)  V/P = k1 
C)  P/V = k1 
D)  k1P = V 
E)  P = -k1V 
A)  PV = k1 
B)  V/P = k1 
C)  P/V = k1 
D)  k1P = V 
E)  P = -k1V

Question 9

If 25.5 L of oxygen are cooled from 150oC to 50oC at constant pressure, what is the new volume of oxygen?

Accepted Answer

A)  0.0514 L 
B)  19.5 L 
C)  33.4 L 
D)  0.03 L 
E)  8.5 L 
A)  0.0514 L 
B)  19.5 L 
C)  33.4 L 
D)  0.03 L 
E)  8.5 L

Question 10

Gases are compressible and have a density that is much higher than liquids and solids.

Accepted Answer

A) True 
 B)False

Question 11

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm3 at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol, 1 atm = 760 mmHg).

Accepted Answer

A)  0.19 g/mol 
B)  35.3 g/mol 
C)  70.9 g/mol 
D)  137 g/mol 
E)  384 g/mol 
A)  0.19 g/mol 
B)  35.3 g/mol 
C)  70.9 g/mol 
D)  137 g/mol 
E)  384 g/mol

Question 12

What is the density of CO2(g) at 100.°C and 10.0 atm pressure? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  1.44 g/L 
B)  134 g/L 
C)  44.0 g/L 
D)  53.6 g/L 
E)  14.4 g/L 
A)  1.44 g/L 
B)  134 g/L 
C)  44.0 g/L 
D)  53.6 g/L 
E)  14.4 g/L

Question 13

What are the units of the constant b in the van der Waals equation?

Accepted Answer

A)  L/mol 
B)  L 
C)  L • atm/K • mol 
D)  L2 • atm/mol2 
A)  L/mol 
B)  L 
C)  L • atm/K • mol 
D)  L2 • atm/mol2

Question 14

Which figure best represents the concept of pressure? (A sphere represents a gaseous atom.)

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 15

What is the definition of "gas"?

Accepted Answer

A "gas" is a substance in whic

Question 16

A fixed quantity of gas has a pressure of 1.35 atm, a volume of 23.8 L, and a temperature of 205.1 K. If the pressure increases to 2.84 atm and the temperature rises to 233.4 K, what is the new volume of the gas?

Accepted Answer

A)  0.183 L 
B)  7.06 L 
C)  9.94 L 
D)  12.9 L 
E)  57.0 L 
A)  0.183 L 
B)  7.06 L 
C)  9.94 L 
D)  12.9 L 
E)  57.0 L

Question 17

At what temperature is the root mean square speed of helium gas equal to that of oxygen gas at 300. K?

Accepted Answer

A)  37.5 K 
B)  75 K 
C)  106 K 
D)  292 K 
E)  2400. K 
A)  37.5 K 
B)  75 K 
C)  106 K 
D)  292 K 
E)  2400. K

Question 18

"The volume of an ideal gas is directly proportional to its absolute temperature at constant pressure and number of moles" is a statement of ________ law.

Accepted Answer

A)  Charles's 
B)  Boyle's 
C)  Dalton's 
D)  Avogadro's 
E)  Gay-Lussac's 
A)  Charles's 
B)  Boyle's 
C)  Dalton's 
D)  Avogadro's 
E)  Gay-Lussac's

Question 19

What is the standard temperature used for STP conditions?

Accepted Answer

The answer of What is the standard temperature used for...

Question 20

________ is the formula to determine the density of a substance using the ideal gas law.

Accepted Answer

The answer of ________ is the formula to determine the...

Exam 10: Gases

What is the significance of the magnitude of the van der Waals "a" constant?

For a gas obeying Boyle's law, a plot of V versus 1/P will give a straight line passing through the origin.

Assuming ideal behavior, what is the density of argon gas at STP? (R = 0.08206 L • atm/K • mol)

What is the volume occupied by 35.2 g of methane gas (CH4) at 25°C and 1.0 atm? (R = 0.08206 L • atm/K • mol)

The temperature of the carbon dioxide atmosphere near the surface of Venus is 475°C. Calculate the average kinetic energy per mole of carbon dioxide molecules on Venus.

Starting from the ideal gas equation, derive an equation corresponding to Charles's law, stating all important assumptions or conditions.

At very high pressures (~1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because

What is the formula which describes the relationship between the pressure and volume at constant temperature and constant number of moles?

If 25.5 L of oxygen are cooled from 150oC to 50oC at constant pressure, what is the new volume of oxygen?

Gases are compressible and have a density that is much higher than liquids and solids.

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm3 at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol, 1 atm = 760 mmHg).

What is the density of CO2(g) at 100.°C and 10.0 atm pressure? (R = 0.08206 L • atm/K • mol)

What are the units of the constant b in the van der Waals equation?

Which figure best represents the concept of pressure? (A sphere represents a gaseous atom.)

What is the definition of "gas"?

A fixed quantity of gas has a pressure of 1.35 atm, a volume of 23.8 L, and a temperature of 205.1 K. If the pressure increases to 2.84 atm and the temperature rises to 233.4 K, what is the new volume of the gas?

At what temperature is the root mean square speed of helium gas equal to that of oxygen gas at 300. K?

"The volume of an ideal gas is directly proportional to its absolute temperature at constant pressure and number of moles" is a statement of ________ law.

What is the standard temperature used for STP conditions?

________ is the formula to determine the density of a substance using the ideal gas law.

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

What is the volume occupied by 35.2 g of methane gas (CH₄) at 25°C and 1.0 atm? (R = 0.08206 L • atm/K • mol)

If 25.5 L of oxygen are cooled from 150^oC to 50^oC at constant pressure, what is the new volume of oxygen?

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100 cm³ at 95°C and 1000 mmHg (R = 0.08206 L • atm/K • mol, 1 atm = 760 mmHg).

What is the density of CO₂(g) at 100.°C and 10.0 atm pressure? (R = 0.08206 L • atm/K • mol)