Deck 9: Gases

Question 1

A _____ is a general instrument that utilizes a liquid column, typically mercury, to measure pressure. Outcome # 10) DOK 1)

A) barometer
B) manometer
C) altimeter

Answer 1

manometer

Question 2

The pressure of a gas in a container is 1.85 atm and occupies a volume of 12.5 L. If the original volume is reduced by half at constant temperature, what would happen to the pressure? Outcome # 6) DOK 2)

A) the pressure would double
B) the pressure would reduce by half
C) the pressure would remain the same

Answer 2

the pressure would double

Question 3

Suppose your car is equipped with tire pressure monitoring system TPMS) and the tire pressure is 34.0 psi on a 98 °F day in California. You decided to take a road trip to Alaska where the temperature drops to 20 °F. As you arrived in Alaska, you noticed that the tire pressure monitoring system alert light is illuminated. Why did this happen? Outcome # 6) DOK 3)

A) as temperature decreases, gas molecules lose kinetic energy and the volume of gas is reduced thus reducing the overall pressure in the tire which results in the TPMS to become activated
B) as temperature decreases, gas molecules gain kinetic energy and the volume of gas is reduced thus reducing the overall pressure in the tire which results in the TPMS to become activated
C) as temperature decreases, gas molecules lose kinetic energy and the volume of gas increases thus reducing the overall pressure in the tire which results in the TPMS to become activated

Answer 3

as temperature decreases, gas molecules lose kinetic energy and the volume of gas is reduced thus reducing the overall pressure in the tire which results in the TPMS to become activated

Question 4

What is the pressure in a 3.41 L container that has 0.741 moles of oxygen gas at 26.0 °C? Outcome # 6) DOK 1) Paired item 1)

A) 5.34 atm
B) 0.464 atm
C) 62.0 atm

Question 5

On a very cold day, you notice that your tires look a bit deflated than warmer days. This observation can be explained by _____. Outcome # 8) DOK 2)

A) Boyles law
B) Ideal gas law
C) Charles law

Question 6

What is the pressure in a 5.80 L container that has 0.545 moles of oxygen gas at 22.0 °C? Outcome # 6) DOK 1)

A) 0.170 atm
B) 2.28 atm
C) 231 atm

Question 7

How many atmospheres are in 710 mm Hg? Outcome # 8) DOK 1)

A) 0.934 atm
B) 1.07 atm
C) 5.40 x 10⁵ atm

Question 8

On a hot summer day, you notice that a bag of chips left in your vehicle has inflated. Why did this happen? Outcome # 6) DOK 3)

A) as temperature increases, gas molecules gain kinetic energy and the volume of gas decreases inside the bag of chips
B) as temperature increases, gas molecules lose kinetic energy and the volume of gas increases inside the bag of chips
C) as temperature increases, gas molecules gain kinetic energy and the volume of gas increases inside the bag of chips

Question 9

What is the relationship between pressure and volume of a gas at constant temperature? Outcome # 8) DOK 2)

A) as volume decreases, pressure increases
B) as volume decreases, pressure decreases
C) as volume increases, pressure increases

Question 10

What is the volume for 1.00 mole of gas at STP? Outcome # 3) DOK 2)

A) 24.5 L
B) 22.4 L
C) 2.05 L

Question 11

The average tire pressure for an automobile is 38.5 psi which is how many atmospheres of pressure? Outcome # 8) DOK 1)

A) 1.77 x 10^-3 atm
B) 566 atm
C) 2.62 atm

Question 12

The pressure of a gas in a container is 1.23 atm and occupies a volume of 1.5 L. If the original volume is doubled at constant temperature, what would happen to the pressure? Outcome # 6) DOK 2)

A) the pressure would remain the same
B) the pressure would double
C) the pressure would reduce by half

Question 13

How many mm Hg are in 0.890 atm of pressure? Outcome # 8) DOK 1)

A) 854 mm Hg
B) 676 mm Hg
C) 1.17 x 10^-3 mm Hg

Question 14

How many moles of CO₂ gas are present in a 9.1 L container at 25 °C and 1.35 atm? Outcome # 6) DOK 1)

A) 4.96 x 10^-3 moles
B) 5.99 moles
C) 0.502 moles

Question 15

What mass of nitrogen is needed to fill an 855 L tank at STP? Outcome # 6) DOK 3)

A) 0.978 kg
B) 1.07 kg
C) 0.533 kg

Question 16

How many psi are in 760. mm Hg? Outcome # 7) DOK 1)

A) 1.47 x 10¹ psi
B) 3.93 x 10⁴ psi
C) 2.54 x 10^-5 psi

Question 17

A _____ is an instrument used to measure atmospheric pressure specifically in the area of meteorology. Outcome # 10) DOK 1)

A) barometer
B) manometer
C) altimeter

Question 18

A sample of nitrogen gas occupies 9.20 L at 21 °C and 0.959 atm. If the pressure is increased to 1.15 atm at constant temperature, what is the newly occupied volume? Outcome # 6) DOK 1)

A) 11.0 L
B) 7.67 L
C) 9.20 L

Question 19

Oxygen gas P_O2 = 1.10 atm), nitrogen gas P_N2 = 0.840 atm), and carbon dioxide gas P_CO2 = 0.125 atm) occupy the same container. What is the total pressure in the container? Outcome # 6) DOK 1)

A) 2.07 atm
B) 1.94 atm
C) 0.135 atm

Question 20

What mass of oxygen is needed to fill a 585 L tank at STP? Outcome # 6) DOK 3) Paired item 1)

A) 0.835 kg
B) 0.765 kg
C) 0.417 kg

Question 21

A container filled with helium and argon gas is 8.00% by volume argon. What is the partial pressure of argon if the total pressure inside the container is 4.100 atm? Outcome # 6) DOK 2) Paired item 1)

A) 0.328 atm
B) 3.77 atm
C) 32.8 atm

Question 22

What is the temperature for STP conditions? Outcome # 4) DOK 1)

A) 273.15 K
B) 298.15 K
C) 0 K

Question 23

A container filled with neon and argon gas is 25.00% by volume neon. What is the partial pressure of argon if the total pressure inside the container is 5.500 atm? Outcome # 6) DOK 2)

A) 412.5 atm
B) 1.375 atm
C) 4.125 atm