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Gas Laws STP

Total questions: 65

Worksheet time: 3hrs 44mins

Name
Class
Date
1.

Pressure is

a)

defined as the mass that an object exerts when at rest

b)

measured in Newtons

c)

defined as the number of moles of substance divided by the mass of the substance

d)

defined as the force per unit area

e)

measured in grams

2.

Boyle's law states that:

a)

Equal amounts of gases occupy the same volume at constant temperature and pressure.

b)

The volume of a fixed amount of gas is inversely proportional to its pressure at constant temperature.

c)

The volume of a fixed amount of gas is directly proportional to its temperature in Kelvin at constant pressure.

d)

The total pressure of a mixture of gases is the simple sum of the partial pressure of all of the gaseous compounds.

e)

The rates of effusion of gases are inversely proportional to the square roots of their molar masses.

3.

Charles's law states that:

a)

Equal amounts of gases occupy the same volume at constant temperature and pressure.

b)

The volume of a fixed amount of gas is inversely proportional to its pressure at constant temperature.

c)

The volume of a fixed amount of gas is directly proportional to its temperature in Kelvin at constant pressure.

d)

The total pressure of a mixture of gases is the simple sum of the partial pressure of all of the gaseous compounds.

e)

The rates of effusion of gases are inversely proportional to the square roots of their molar masses.

4.

A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6°C. Determine the temperature at which the volume of the gas is 3.42 L.

a)

312 K

b)

278 K

c)

20.4 K

d)

295 K

e)

552 K

5.

A balloon has a volume of 2.32 liters at 24.0°C. The balloon is heated to 48.0°C. Calculate the new volume of the balloon.

a)

2.32 L

b)

2.51 L

c)

2.15 L

d)

4.64 L

e)

1.16 L

6.

Body temperature is about 309 K. On a cold day, what volume of air at 276 K must a person with a lung capacity of 2.2L breathe in to fill the lungs?

a)

2.46L

b)

1.97

c)

2.08

d)

3.93

7.
Which of the following would increase the (gas) pressure of a system?
a)
Increase the Temperature
b)
Pump in more gas
c)
Decrease the volume
d)
All of these
8.

A gas sample has an initial volume of 55.2 mL, an initial temperature of 35.0oC and an initial pressure of 735 mm Hg. The volume is decreased to 48.8 mL and the temperature is increased to 72.5oC . What is the final pressure ?

a)

933 mm Hg

b)

186 mm Hg

c)

1.72 x 103 mmHg

d)

84.0 g Kr

9.

The combined gas law allows us to determine relationships between temperature, pressure and the volume of gases, including those used in a gas balloon. What is the final pressure if 155.0 mL of a gas at 22.0oC and 374 mmHg is cooled to 0oC and has a final volume of 102.0 mL

a)

526 mm Hg

b)

614 mmHg

c)

73.4 mmHg

d)

39.1 mmHg

10.

This graph represents which gas law ?

a)

Grahams law

b)

Avogadros law

c)

Boyles Law

d)

Charles Law

11.
Neon occupies a volume of 2.80 L at -35°C. What volume will it occupy at 43°C?
a)
3.44 L
b)
4.1 L
c)
2.65 L
d)
3.7 L
12.
If 200 mL of a gas at 27°C is cooled to -33°C at a constant pressure, the volume will be
a)
250 mL
b)
204 mL
c)
196 mL
d)
160 mL
13.
A sample of gas measures 4.22 L at 120°C at 900 mmHg. What volume would it occupy at STP?
a)
2.48 L
b)
3.47 L
c)
5.13 L
d)
7.19 L
14.
A 135 mL sample of argon had its pressure changed from 75.0 kPa to 121 kPa. What is its new volume?
a)
83.7 mL
b)
98.3 mL
c)
76.4 mL
d)
5 mL
15.

A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL?

a)

57.5⁰C

b)

57.5 K

c)

331 K

d)

330.5⁰C

16.

If 550 mL of a gas at 27°C is cooled to -33°C at a constant pressure, the volume will be

a)

250 mL

b)

440 mL

c)

196 mL

d)

160 mL

17.
At STP (Standard Temperature and Pressure), a gas has a volume of 3.0 L. What is the new volume if the pressure increases to 303.9 kPa? 
a)
9 L
b)
1 L
c)
9 kPa
d)
1 kPa
18.

Determine the initial temperature of a random gas when the initial volume is 2.2 L and it is cooled to 88K with a volume of 0.85 L.

a)

0.029 K

b)

0.021 K

c)

230 K

d)

34 K

19.

A sample of oxygen gas has a volume of 150.0 mL when its pressure is 0.947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?

a)

72 mL

b)

144 mL

c)

216 mL

d)

288 mL

20.

1. A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. What volume will it occupy at 800.0 torr pressure?

a)

270 mL

b)

240 mL

c)

230 mL

d)

220 mL

21.

1. A sample of carbon dioxide occupies a volume of 3.50 liters at 1.25 atm of pressure. What pressure would the gas exert if the volume was decreased to 2.00 liters?

a)

2.19 atm

b)

2.22 atm

c)

5.67 atm

d)

6.54 atm

22.
There are 40 liters of helium in a balloon at 100 K. If the temperature of the balloon is increased to 200 K, what will the new volume of the balloon be?
a)
80 L
b)
45 L
c)
54 L
d)
45.33 L
23.

A gas has a volume of 45 liters at a pressure of 90.8 kPa. If the volume is increased to 55 liters, what will be the new pressure? Round answer to one decimal place.

(a)  

24.

A gas occupies a volume of 5.6 liters at a temperature of 100.0 degrees Celsius. To what temperature must the gas be lowered, if it is to occupy 4.0 liters? Answer in Kelvin to one decimal place.

(a)  

25.

A gas has a pressure of 98.0 kPa at 30.0o Celsius. What will be the new pressure if the temperature is increased to 35.0o Celsius?

(a)  

26.

Hydrogen gas has a pressure of 142 kPa at a temperature of 28.0o Celsius. If the pressure is increased to 184 kPa, what will be the new temperature in degrees Celsius?

(a)  

27.

A sample of sulfur hexafluoride gas occupies a volume of 5.10 liters at 198o Celsius. What temperature is needed to reduce the volume to 2.50 liters?

(a)  

28.

A rigid plastic container holds 1.00 L methane gas at 0.90 atm pressure when the temperature is 22.0°C. How much more pressure will the gas exert if the temperature is raised to 44.6°C?

a)

0.97 atm

b)

1.82 atm

c)

0.97oC

d)

1.82oC

29.

If a gas sample has a pressure of 0.303 atm at 0°C, by how much does the temperature have to decrease to lower the pressure to 28.4 kPa?

a)

34 oC

b)

-20 oC

c)

597 oC

d)

-4.25 oC

30.

A sample of sulfur dioxide occupies a volume of 652 mL at 313 K and 150.0 kPa. What volume will the sulfur dioxide occupy at STP?

a)

1682.6 mL

b)

20.7 mL

c)

492.3 mL

d)

842 mL

31.

If 3.0 L of helium at 293 K with a pressure of 200 kPa is allowed to expand to 4.4 L with the pressure staying constant. What is the new temperature?

a)

702 K

b)

430 K

c)

157 K

d)

0 K

32.

A weather balloon has a volume of 105 L at 98.3 kPa when the temperature is 318 K. What is the volume at 293 K and 106.4 kPa?

a)

0.32 L

b)

89.4 L

c)

93.8 L

d)

3.13 L

33.

What is the pressure of a car tire that had an initial pressure of 1.8 atm but was heated from 38°C to 123°C?

a)

0.9 atm

b)

2.3 atm

c)

1.6 atm

d)

3.4 atm

34.

A sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC. What is the new volume of the gas?

a)

60.0 mL

b)

15.0 mL

c)

27.5 mL

d)

32.5 mL

35.

A gas has a volume of 480 ml at 90.0 mmHg pressure. What pressure is needed to change the volume of the gas to 320 ml?

a)

60.0 mmHg

b)

80.0 mmHg

c)

140 mmHg

d)

135 mmHg

36.

A gas has a volume of 10cm3 and is at a pressure of 100kPa. The volume is doubled to 20cm3, what is its new pressure?

a)

100kPa

b)

50kPa

c)

200kPa

d)

10kPa

37.

Three Liters of Nitrogen is present in a container. Initially the pressure inside is 80.0 atm but it decreased to 10.0 atm. What is the new volume of gas in the container?

a)

1 Liters

b)

24 Liters

c)

3 Liters still

d)

3.75 Liters

e)

93

38.
10 L of a gas is collected at 100 K and allowed to expand to 30.0 L. What is the new temperature?
a)
400 K
b)
300 K
c)
275 K
d)
250 K
39.

At a constant pressure and 28.0°C a sample of gas occupies 5.00 L. At what temperature will the gas occupy 10.0 L?

a)

56 °C

b)

56 K

c)

602 °C

d)

602 K

40.

At standard pressure, a sample of nitrogen occupies 400 mL. What volume does the gas occupy when the pressure doubles?

a)

200 mL

b)

400 mL

c)

800 mL

d)

2 mL

41.

In a closed container at 6 atm, the temperature of a sample is raised from 200 K to 300 K. What will be the final pressure of the gas?

a)

9 atm

b)

3 atm

c)

6 atm

d)

12 atm

42.

1. Fluorine gas exerts a pressure of 900.0 torr. When the pressure is changed to 1.50 atm, its volume is 250.0 mL. What was the original volume?

a)

317 mL

b)

325 mL

c)

305 mL

43.

A gas at a pressure of 928.0 kpa and a temperature of 129.0oC occupies a volume of 569.0 L. Calculate the volume at 319.0 kpa and 32.00oC.

a)

410.61 L

b)

418.18 L

c)

1256 L

d)

1400 L

44.
When a cold tire is inflated to a certain pressure and then is warmed up due to friction with the road, the pressure increases. This happens because the
a)
air molecules hit the walls of the tire less frequently
b)
rubber in the tires reacts with oxygen in the atmosphere
c)
air molecules speed up and collide with the tire walls more often
d)
air molecules diffuse rapidly through the walls of the tire.
45.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.
a)
7.18 L 
b)
7.81 L
c)
4.63 L
d)
4.36 L
e)

8 L

46.

Determine the temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under 0.998 atm pressure. 

a)

200 K 

b)
107 K 
c)
207 K 
d)

310 K 

e)

300K

47.

What does R stand for

a)

Ideal gas constant

b)

Real gas constant

c)

Temperature constant

d)

Ideal gas law

e)

Pressure constant

48.

Determine the Celsius temperature of 2.49 moles of gas contained in a 1.00-L vessel at a pressure of 143 kPa. Solve for T and then change you answer to Celcius

a)
-266 degrees C
b)
-622 degrees C
c)
622 degrees C 
d)
266 degrees C
49.

Determine the number of moles in a container of gas at STP with a volume of 99.2 L. 

Please use kilopascals for pressure.

a)
2222.08 moles
b)
4.43 moles
c)
22.4 moles 
d)
76.8 moles
50.
In order to solve gas law calculations, temperature must be measured in:
a)
Fahrenheit
b)
Celsius
c)
Kelvin
d)
It doesn't matter 
e)

Kilojoules

51.

At STP, what is the pressure in atmospheres?

a)
1 atm
b)
10 atm
c)
0 atm
d)
100 atm
e)

101.3 atm

52.
What is the pressure exerted by 5.00 moles of nitrogen gas contained in a 30.0 Liter container at 25.0 °C?
a)
3670 atm
b)
0.245 atm
c)
4.08 atm
d)
605 atm
53.

We can use two R values: 0.0821 and 8.31.

How do you know which to use for an ideal gas problem?

a)

The units for pressure

b)

The units for temperature

c)

The units of volume

d)

The amount of moles

e)

Your instructor will tell you for each question

54.

In the following, what is the unknown variable:

What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?

a)

P

b)

V

c)

n

d)

T

e)

R

55.

In the following, what will be the value for R:

What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?

a)

0.0821 L⋅atm∕mol⋅K

b)

8.31 L⋅kPa∕mol⋅K

c)

0*C

d)

273 K

e)

101.3 kpa

56.

What is STP?

a)

1*C and 100atm

b)

0*C and 1atm

c)

0K and 101.3kpa

d)

273*C and 273atm

e)

273K and 101.3 kpa

57.

A 6.0 L sample at 25°C and 2.00 atm of pressure contains 0.5 mole of a gas. If an additional 0.25 mole of gas at the same pressure and temperature are added, what is the final total volume of the gas?

a)

6.0 L

b)

7.0 L

c)

8.0 L

d)

9.0 L

58.

5.0 g of neon is at 256 mm Hg and at a temperature of 35º C. What is the volume?

a)

19 L

b)

15 L

c)

20 L

d)

10 L

59.

How many moles of helium are in a gas

sample that has a volume of 500.0 mL at a

pressure of 3.00 atm and a temperature of

298 K?

a)

6.13 moles

b)

0.613 moles

c)

0.0613 moles

d)

61.3 moles

60.
When 0.250 moles of a gas is placed in a container at 25 °C, it exerts a pressure of 700 mm Hg. What is the volume of the container?
a)
0.557 Liters
b)
6.57 Liters
c)
8.74 Liters
d)
0.0087 Liters
61.
Mg3N2(s) + 3H2O(l) ––> 3 MgO + 2NH3(g)
If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?
a)
27.1 L H2
b)
4.96 L H2
c)
0.204 L H2
d)
10.3 L H2
62.

Mg3N2 + 3H2O ––> 3 MgO + 2NH3

If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?

a)

4.9 L NH3

b)

4.96 L NH3

c)

0.261 L NH3

d)

0.26 L NH3

63.

2NaN3 → 2Na + 3N2

At what pressure(atm) is the nitrogen gas sample that is collected when 48.4 g of NaN3 decomposes? The temperature of the gas is 25.0°C and the volume is 18.4 L.

a)

151 atm

b)

1130 atm

c)

0.125 atm

d)

1.48 atm

64.
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium with excfess water according to the following reaction?
1Mg + 2H2O --> Mg(OH)2 + H2
a)
62L
b)
65L
c)
31L
d)
124L
65.

If you wanted to react 3.00 L of chlorine (Cl2) gas at 1.00 atm and 350K, how many mols acetylene (C2H2) would need to be used to ensure all the chlorine is consumed? (Remember the three steps!)

2 Cl2(g) + C2H2(g) --> C2H2Cl4(l)

a)

0.043 mol

b)

0.064 mol

c)

0.052 mol

d)

0.023 mol

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