Question 1

4.27 L of a gas are collected at 53 °C and 527 torr.What would this volume be if adjusted to STP?

Accepted Answer

A) 0 L 
B) 7.35 L 
C) 5.16 L 
D) 3.54 L 
E) 2.48 L 
A) 0 L 
B) 7.35 L 
C) 5.16 L 
D) 3.54 L 
E) 2.48 L

Question 2

Which of the following correctly describes the relationship between the volume and temperature of a fixed quantity of an ideal gas at constant pressure?
i.V ∝ T
ii.V ∝ 1/T
iii.V = kT
iv.V = k(1/T)

Accepted Answer

A) iv only 
B) i and ii 
C) iii and iv 
D) i and iii 
E) ii and iv 
A) iv only 
B) i and ii 
C) iii and iv 
D) i and iii 
E) ii and iv

Question 3

Consider the following graph.The data for the graph was obtained at constant temperature.   Which of the following correctly describes the relationship shown on the graph?
i.V ∝ P
ii.V ∝ 1/P
iii.V = kP
iv.V = k(1/P)

Accepted Answer

A) iv only 
B) i and ii 
C) iii and iv 
D) i and iii 
E) ii and iv 
A) iv only 
B) i and ii 
C) iii and iv 
D) i and iii 
E) ii and iv

Question 4

A fixed quantity of a gas is maintained at constant pressure as the volume decreases from 1.75 L to 1.25 L.If the temperature was 57 °C at the larger volume,what is it at the smaller volume?

Accepted Answer

A)  –37 °C 
B)  41 °C 
C)  80. °C 
D)  189 °C 
E)  236 °C 
A)  –37 °C 
B)  41 °C 
C)  80. °C 
D)  189 °C 
E)  236 °C

Question 5

A perfume bottle is opened in a dressing room,and a short while later you detect the odor in the living room.Which of the following features of the ideal gas model best explains this phenomenon?

Accepted Answer

A) Gases consist of molecular particles moving at any instant in straight lines 
B) Molecules collide with each other and with the container walls without loss of energy 
C) Gas molecules behave as independent particles 
D) Gas molecules are very widely spaced 
E) The actual volume of molecules is negligible compared to the space they occupy 
A) Gases consist of molecular particles moving at any instant in straight lines 
B) Molecules collide with each other and with the container walls without loss of energy 
C) Gas molecules behave as independent particles 
D) Gas molecules are very widely spaced 
E) The actual volume of molecules is negligible compared to the space they occupy

Question 6

A cylindrical gas chamber has a piston at one end that can be used to compress or expand the gas.If the gas is initially at 992 torr when the volume is 2.77 L,what will be the volume if the pressure is reduced to 501 torr at constant temperature?

Accepted Answer

A) 0.182 L 
B) 0.715 L 
C) 1.40 L 
D) 5.48 L 
E) 1.38 × 106 L 
A) 0.182 L 
B) 0.715 L 
C) 1.40 L 
D) 5.48 L 
E) 1.38 × 106 L

Question 7

A gas with an initial volume of 34.4 mL,measured at -22°C,is heated to 0°C at constant pressure.What is the new volume of the gas?

Accepted Answer

A) 31.6 mL 
B) 37.4 mL 
C) 0 mL 
D) Heating a gas from a negative temperature to zero will cause it to explode because it then will be unstable 
E) It is not possible for a gas to have a temperature of -22°C 
A) 31.6 mL 
B) 37.4 mL 
C) 0 mL 
D) Heating a gas from a negative temperature to zero will cause it to explode because it then will be unstable 
E) It is not possible for a gas to have a temperature of -22°C

Question 8

A gas occupies a volume of 3.5 L at 24 °C and 883 mm Hg.What volume will it occupy at STP?

Accepted Answer

A) 2.7 L 
B) 3.3 L 
C) 3.7 L 
D) 4.4 L 
E) 7.0 L 
A) 2.7 L 
B) 3.3 L 
C) 3.7 L 
D) 4.4 L 
E) 7.0 L

Question 9

Consider the following weather map showing the southwestern part of the United States.   This map seems to indicate that this geographical region:

Accepted Answer

A) is experiencing barometric pressures greater than 760 mm Hg. 
B) that air masses are descending and warming. 
C) cloud formation is likely. 
D) is experiencing lower than normal temperatures. 
E) All of the above are likely to occur in this region in the time frame of this map. 
A) is experiencing barometric pressures greater than 760 mm Hg. 
B) that air masses are descending and warming. 
C) cloud formation is likely. 
D) is experiencing lower than normal temperatures. 
E) All of the above are likely to occur in this region in the time frame of this map.

Question 10

0.847 L of a gas is heated from 12 °C to 33 °C at constant pressure.What will the volume be at the higher temperature?

Accepted Answer

A) 1.10 L 
B) 0.909 L 
C) 0.789 L 
D) 0.308 L 
E) 2.33 L 
A) 1.10 L 
B) 0.909 L 
C) 0.789 L 
D) 0.308 L 
E) 2.33 L

Question 11

Which of the following statements is false?

Accepted Answer

A) Particle motion explains why gases fill their containers 
B) When an individual particle in a gaseous sample strikes a container wall, it exerts a force at the point of collision 
C) Gases consist of molecular particles moving at any given instant in straight lines 
D) Gas pressures depend on the depth to which a container is filled with a gas 
E) Gas pressures are independent of external factors such as gravitational forces 
A) Particle motion explains why gases fill their containers 
B) When an individual particle in a gaseous sample strikes a container wall, it exerts a force at the point of collision 
C) Gases consist of molecular particles moving at any given instant in straight lines 
D) Gas pressures depend on the depth to which a container is filled with a gas 
E) Gas pressures are independent of external factors such as gravitational forces

Question 12

The volume of a sealed gas balloon is changed from 953 mL to 808 mL at constant temperature.The original pressure was 155 kPa.What is the pressure after the volume is reduced ?

Accepted Answer

A) 0.00547 kPa 
B) 0.00761 kPa 
C) 131 kPa 
D) 183 kPa 
E) 1.19 × 108 kPa 
A) 0.00547 kPa 
B) 0.00761 kPa 
C) 131 kPa 
D) 183 kPa 
E) 1.19 × 108 kPa

Question 13

A gas has a volume of 3.77 m3 at 271 kPa.What will be its volume if the pressure is changed to 535 kPa?

Accepted Answer

A) 0.134 m3 
B) 0.524 m3 
C) 1.91 m3 
D) 7.44 m3 
E) 5.47 × 105 m3 
A) 0.134 m3 
B) 0.524 m3 
C) 1.91 m3 
D) 7.44 m3 
E) 5.47 × 105 m3

Question 14

A gas sample is originally at 93.9 kPa and 27 °C with a volume of 1.17 m3.What will be the resulting temperature if the pressure is adjusted to 117 kPa and the volume is reduced to 0.730 m3?

Accepted Answer

A) 326 °C 
B) 113 °C 
C) 21 °C 
D) -123 °C 
E) -40 °C 
A) 326 °C 
B) 113 °C 
C) 21 °C 
D) -123 °C 
E) -40 °C

Question 15

The pressure of the gas in a compressed gas tank is 862 kPa when the gas is at 35 °C.To what will the pressure change when the temperature drops to 7 °C?

Accepted Answer

A) 0.00128 kPa 
B) 4.31 × 103 kPa 
C) 172 kPa 
D) 784 kPa 
E) 948 kPa 
A) 0.00128 kPa 
B) 4.31 × 103 kPa 
C) 172 kPa 
D) 784 kPa 
E) 948 kPa

Question 16

Which of the following is correct?

Accepted Answer

A) 5.99 × 108 in. Hg = 1.77 × 105 Pa 
B) 25.0 psi = 172 kPa 
C) 5.64 × 105 atm = 742 mm Hg 
D) 75.0 cm Hg = 75.0 torr 
E) 153 kPa = 1.55 × 104 atm 
A) 5.99 × 108 in. Hg = 1.77 × 105 Pa 
B) 25.0 psi = 172 kPa 
C) 5.64 × 105 atm = 742 mm Hg 
D) 75.0 cm Hg = 75.0 torr 
E) 153 kPa = 1.55 × 104 atm

Question 17

Which of the following pressures is equal to 0.80 atm?

Accepted Answer

A) 9.5 × 102 torr 
B) 1.3 bar 
C) 24 in. Hg 
D) 18 psi 
E) 1.0 kPa 
A) 9.5 × 102 torr 
B) 1.3 bar 
C) 24 in. Hg 
D) 18 psi 
E) 1.0 kPa

Question 18

27.7 L of a gas is cooled at constant pressure from 87 °C to 24 °C.What will the volume be at the lower temperature?

Accepted Answer

A) 0.0438 L 
B) 7.64 L 
C) 22.9 L 
D) 33.6 L 
E) 1.00 × 102 L 
A) 0.0438 L 
B) 7.64 L 
C) 22.9 L 
D) 33.6 L 
E) 1.00 × 102 L

Question 19

Consider the open-end manometer shown below.   When the pressure of the atmosphere is 754 mmHg,what is the pressure of the gas sample?

Accepted Answer

A) 225 mm Hg 
B) 754 mm Hg 
C) 499 mm Hg 
D) 1009 mm Hg 
A) 225 mm Hg 
B) 754 mm Hg 
C) 499 mm Hg 
D) 1009 mm Hg

Question 20

Which of the following statements is true?

Accepted Answer

A) The actual volume of ideal gas molecules is negligible compared to the space they occupy 
B) In an ideal gas, the volume of the molecules is typically as low as 10% of the total container volume 
C) The distances between ideal gas molecules are usually about the same as the diameter of the molecules 
D) Given that there is no chemical reaction between two gases, the ability to mix the gases in a rigid container of fixed volume depends on the external atmospheric pressure 
E) Ideal gas molecules usually touch one another in a small container with low pressure and high temperature 
A) The actual volume of ideal gas molecules is negligible compared to the space they occupy 
B) In an ideal gas, the volume of the molecules is typically as low as 10% of the total container volume 
C) The distances between ideal gas molecules are usually about the same as the diameter of the molecules 
D) Given that there is no chemical reaction between two gases, the ability to mix the gases in a rigid container of fixed volume depends on the external atmospheric pressure 
E) Ideal gas molecules usually touch one another in a small container with low pressure and high temperature

Exam 4: Introduction to Gases

4.27 L of a gas are collected at 53 °C and 527 torr.What would this volume be if adjusted to STP?

Which of the following correctly describes the relationship between the volume and temperature of a fixed quantity of an ideal gas at constant pressure? i.V ∝ T ii.V ∝ 1/T iii.V = kT iv.V = k(1/T)

Consider the following graph.The data for the graph was obtained at constant temperature. Which of the following correctly describes the relationship shown on the graph? i.V ∝ P ii.V ∝ 1/P iii.V = kP iv.V = k(1/P)

A fixed quantity of a gas is maintained at constant pressure as the volume decreases from 1.75 L to 1.25 L.If the temperature was 57 °C at the larger volume,what is it at the smaller volume?

A perfume bottle is opened in a dressing room,and a short while later you detect the odor in the living room.Which of the following features of the ideal gas model best explains this phenomenon?

A cylindrical gas chamber has a piston at one end that can be used to compress or expand the gas.If the gas is initially at 992 torr when the volume is 2.77 L,what will be the volume if the pressure is reduced to 501 torr at constant temperature?

A gas with an initial volume of 34.4 mL,measured at -22°C,is heated to 0°C at constant pressure.What is the new volume of the gas?

A gas occupies a volume of 3.5 L at 24 °C and 883 mm Hg.What volume will it occupy at STP?

Consider the following weather map showing the southwestern part of the United States. This map seems to indicate that this geographical region:

0.847 L of a gas is heated from 12 °C to 33 °C at constant pressure.What will the volume be at the higher temperature?

Which of the following statements is false?

The volume of a sealed gas balloon is changed from 953 mL to 808 mL at constant temperature.The original pressure was 155 kPa.What is the pressure after the volume is reduced ?

A gas has a volume of 3.77 m3 at 271 kPa.What will be its volume if the pressure is changed to 535 kPa?

A gas sample is originally at 93.9 kPa and 27 °C with a volume of 1.17 m3.What will be the resulting temperature if the pressure is adjusted to 117 kPa and the volume is reduced to 0.730 m3?

The pressure of the gas in a compressed gas tank is 862 kPa when the gas is at 35 °C.To what will the pressure change when the temperature drops to 7 °C?

Which of the following is correct?

Which of the following pressures is equal to 0.80 atm?

27.7 L of a gas is cooled at constant pressure from 87 °C to 24 °C.What will the volume be at the lower temperature?

Consider the open-end manometer shown below. When the pressure of the atmosphere is 754 mmHg,what is the pressure of the gas sample?

Which of the following statements is true?

Matter and Energy

Measurement and Chemical Calculations

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

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A gas has a volume of 3.77 m³ at 271 kPa.What will be its volume if the pressure is changed to 535 kPa?

A gas sample is originally at 93.9 kPa and 27 °C with a volume of 1.17 m³.What will be the resulting temperature if the pressure is adjusted to 117 kPa and the volume is reduced to 0.730 m³?