Question 1

Convert 13.3 psi to kPa and torr.

Accepted Answer

A) 1.35 *103 kPa; 1.01 *104 torr 
B) 91.7 kPa; 688 torr 
C) 1.93 kPa; 0.257 torr 
D) 91.7 kPa; 0.257 torr 
E) 1.93 kPa; 688 torr 
A) 1.35 *103 kPa; 1.01 *104 torr 
B) 91.7 kPa; 688 torr 
C) 1.93 kPa; 0.257 torr 
D) 91.7 kPa; 0.257 torr 
E) 1.93 kPa; 688 torr

Question 2

On a day when atmospheric pressure is 14.6 psi,a tire pressure gauge is used to measure the pressure of an automobile tire and it registers 42.0 psi.What is the actual air pressure inside the tire?

Accepted Answer

A) 14.6 psi 
B) 42.0 psi 
C) 56.6 psi 
D) 27.4 psi 
E) 84.0 psi 
A) 14.6 psi 
B) 42.0 psi 
C) 56.6 psi 
D) 27.4 psi 
E) 84.0 psi

Question 3

Which of the following statements is true?

Accepted Answer

A) The attractive forces among ideal gas molecules are known as kinetic molecular forces 
B) Ideal gas molecules behave as independent particles 
C) The movement of a given ideal gas molecule is influenced only by the molecules in the immediate vicinity of that molecule 
D) The attractive forces among ideal gas molecules are short-range forces 
E) The attractive forces among ideal gas molecules primarily depend upon the size of the particles 
A) The attractive forces among ideal gas molecules are known as kinetic molecular forces 
B) Ideal gas molecules behave as independent particles 
C) The movement of a given ideal gas molecule is influenced only by the molecules in the immediate vicinity of that molecule 
D) The attractive forces among ideal gas molecules are short-range forces 
E) The attractive forces among ideal gas molecules primarily depend upon the size of the particles

Question 4

The pressure on 474 mL of a gas is changed from 726 mm Hg to 622 mm Hg.What is the volume at the new pressure?

Accepted Answer

A) 2.14 * 108 mL 
B) 553 mL 
C) 406 mL 
D) 0.00246 mL 
E) 0.00181 mL 
A) 2.14 * 108 mL 
B) 553 mL 
C) 406 mL 
D) 0.00246 mL 
E) 0.00181 mL

Question 5

The pressure of a gas is 817 torr at 55.0°C.The quantity of the gas is fixed and the volume remains constant as the pressure is adjusted to 6.00 * 102 torr.What is the resulting temperature of the gas?

Accepted Answer

A) -32 °C 
B) 40 °C 
C) 174 °C 
D) 241 °C 
E) 447 °C 
A) -32 °C 
B) 40 °C 
C) 174 °C 
D) 241 °C 
E) 447 °C

Question 6

A container holds 34.3 m3 of gas at 65.0°C.If pressure remains constant,what will the volume be if the temperature falls to 25 °C?

Accepted Answer

A) 38.9 m3 
B) 0.0331 m3 
C) 89.2 m3 
D) 30.2 m3 
E) 13.2 m3 
A) 38.9 m3 
B) 0.0331 m3 
C) 89.2 m3 
D) 30.2 m3 
E) 13.2 m3

Question 7

A gas occupies 4.71 liters at 62 °C and 795 torr.What volume will it occupy if it is cooled to 17 °C and compressed to 911 torr?

Accepted Answer

A) 3.56 L 
B) 6.23 L 
C) 1.13 L 
D) 4.75 L 
E) 4.67 L 
A) 3.56 L 
B) 6.23 L 
C) 1.13 L 
D) 4.75 L 
E) 4.67 L

Question 8

A gas sample originally occupies 436 mL at 24 °C.When the volume is expanded to 612 mL and the temperature is increased to 97 °C,the pressure becomes 526 mm Hg.What was the original pressure?

Accepted Answer

A) 183 mm Hg 
B) 301 mm Hg 
C) 467 mm Hg 
D) 593 mm Hg 
E) 920 mm Hg 
A) 183 mm Hg 
B) 301 mm Hg 
C) 467 mm Hg 
D) 593 mm Hg 
E) 920 mm Hg

Question 9

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 $\infty$ T
(ii)V $\infty$ 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 10

The STP volume of an ideal gas is 2.06 m3.Calculate the volume of the sample at 1.75 atm and 27 °C.

Accepted Answer

A) 0.773 m3 
B) 1.07 m3 
C) 1.29 m3 
D) 3.28 m3 
E) 3.96 m3 
A) 0.773 m3 
B) 1.07 m3 
C) 1.29 m3 
D) 3.28 m3 
E) 3.96 m3

Question 11

Calculate the original volume of a sealed balloon if it was originally at 25 °C and 1.02 atm,and then it was changed to 5.79 L,77 °C,and 1.72 atm.

Accepted Answer

A) 4.03 L 
B) 3.17 L 
C) 8.31 L 
D) 2.92 L 
E) 11.5 L 
A) 4.03 L 
B) 3.17 L 
C) 8.31 L 
D) 2.92 L 
E) 11.5 L

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 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 14

Consider the following graph.   This graph is an illustration of which of the following laws?

Accepted Answer

A) Charles's law 
B) Boyle's law 
C) combined gas law 
D) law of conservation of mass 
E) law of conservation of energy 
A) Charles's law 
B) Boyle's law 
C) combined gas law 
D) law of conservation of mass 
E) law of conservation of energy

Question 15

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 16

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 17

A gas sample occupies 8.15 volume units at 677 pressure units.If possible,find the volume of the gas if the pressure is changed to 278 pressure units.The pressure units are the same in both cases and the temperature is constant.

Accepted Answer

A) It is not possible to find the new volume,although it would be greater than the original volume. 
B) It is not possible to find the new volume,although it would be less than the original volume. 
C) It is not possible to find the new volume,and no comparison with the original volume is possible. 
D) 19.8 volume units 
E) 3.35 volume units 
A) It is not possible to find the new volume,although it would be greater than the original volume. 
B) It is not possible to find the new volume,although it would be less than the original volume. 
C) It is not possible to find the new volume,and no comparison with the original volume is possible. 
D) 19.8 volume units 
E) 3.35 volume units

Question 18

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 19

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 20

Which of the following statements is true?

Accepted Answer

A) Gas particles often are attracted to one another and therefore behave as grouped particles. 
B) The volume occupied by particles of a gas typically accounts for about 10-25% of the container volume. 
C) Particles in a gas have very little space between them. 
D) Gas particles gradually decrease in total kinetic energy over time. 
E) Gases consist of molecular (or atomic)particles moving at any given instant in straight lines. 
A) Gas particles often are attracted to one another and therefore behave as grouped particles. 
B) The volume occupied by particles of a gas typically accounts for about 10-25% of the container volume. 
C) Particles in a gas have very little space between them. 
D) Gas particles gradually decrease in total kinetic energy over time. 
E) Gases consist of molecular (or atomic)particles moving at any given instant in straight lines.

Exam 4: Introduction to Gases

Convert 13.3 psi to kPa and torr.

On a day when atmospheric pressure is 14.6 psi,a tire pressure gauge is used to measure the pressure of an automobile tire and it registers 42.0 psi.What is the actual air pressure inside the tire?

Which of the following statements is true?

The pressure on 474 mL of a gas is changed from 726 mm Hg to 622 mm Hg.What is the volume at the new pressure?

The pressure of a gas is 817 torr at 55.0°C.The quantity of the gas is fixed and the volume remains constant as the pressure is adjusted to 6.00 * 102 torr.What is the resulting temperature of the gas?

A container holds 34.3 m3 of gas at 65.0°C.If pressure remains constant,what will the volume be if the temperature falls to 25 °C?

A gas occupies 4.71 liters at 62 °C and 795 torr.What volume will it occupy if it is cooled to 17 °C and compressed to 911 torr?

A gas sample originally occupies 436 mL at 24 °C.When the volume is expanded to 612 mL and the temperature is increased to 97 °C,the pressure becomes 526 mm Hg.What was the original pressure?

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 ∞\infty∞ T (ii)V ∞\infty∞ 1/T (iii)V = kT (iv)V = k(1/T)

The STP volume of an ideal gas is 2.06 m3.Calculate the volume of the sample at 1.75 atm and 27 °C.

Calculate the original volume of a sealed balloon if it was originally at 25 °C and 1.02 atm,and then it was changed to 5.79 L,77 °C,and 1.72 atm.

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 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?

Consider the following graph. This graph is an illustration of which of the following laws?

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

A gas sample occupies 8.15 volume units at 677 pressure units.If possible,find the volume of the gas if the pressure is changed to 278 pressure units.The pressure units are the same in both cases and the temperature is constant.

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

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?

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

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Chemical Equilibrium

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The pressure of a gas is 817 torr at 55.0°C.The quantity of the gas is fixed and the volume remains constant as the pressure is adjusted to 6.00 * 10² torr.What is the resulting temperature of the gas?

A container holds 34.3 m³ of gas at 65.0°C.If pressure remains constant,what will the volume be if the temperature falls to 25 °C?

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 $\infty$ T (ii)V $\infty$ 1/T (iii)V = kT (iv)V = k(1/T)

The STP volume of an ideal gas is 2.06 m³.Calculate the volume of the sample at 1.75 atm and 27 °C.