Question 1

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

Question 2

What is the definition of "gas"?

Accepted Answer

A "gas" is a substance in whic...

Question 3

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 4

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

Question 5

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.

Question 6

________ 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...

Question 7

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

Question 8

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

Question 9

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

Question 10

"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

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

What is the standard temperature used for STP conditions?

Accepted Answer

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

Question 16

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

Accepted Answer

The magnitude of the van der W...

Question 17

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 18

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

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 19

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

Question 20

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

Exam 10: Gases

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

"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.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe magnitude of the van der W...View AnswerShow Answer

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)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the standard temperature used for STP conditions?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe ideal gas equation is PV = nRT. Char...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

What is the definition of "gas"?

Correct AnswerverifiedA "gas" is a substance in whic...View AnswerShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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) .

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The magnitude of the van der W...
View Answer

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)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The ideal gas equation is PV = nRT. Char...
View Answer

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

Correct Answer
verified

Correct Answer
verified
A "gas" is a substance in whic...
View Answer

Correct Answer
verified

Correct Answer
verified

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) .

Correct Answer
verified