Gas Lawsname______
All work on Separate Sheet of Paper Show Work, Units+sub, sigfigs, circle answers
Pressure Conversions
1)The critical pressure of carbon dioxide is 72.7 atm. What is the value in units of pascals? 7.37x106
2)Vapor pressure of °C is 12.33 kPa. What’s the value in millimeters of mercury?92.48
3)In thermodynamics, standard pressure is 100.0 kPa. What’s the value in units of atmospheres?0.9869
4)A tire is inflated to a gauge pressure of 30.0 psi. (atmospheric pressure is 14.7 psi) Convert the total pressure in the tire to pascals. *1st find total pressure in the tire.3.08x105
5)Atmospheric pressure on top of Mount Everest is 58 kPa. What is the pressure in atmospheres? 0.57
6)The vapor pressure of water at 0°C is 4.579 mm Hg. What is this pressure in pascals? 610.5
7)A laboratory vacuum system operates at 1.0x10-5 mm Hg. What is this pressure in pascals? 1.3x10-3
8)Convert 392mmHg atm 0.516
9)Convert 2.91atm kPa 295
10)Convert 700. kPa to mm Hg. 5250
Boyle’s Law (P1V1=P2V2),Show Work, Units+sub, sigfigs, circle answers
11)A sample of oxygen gas has a volume of 150.0mL when its pressure is 0.947atm. What will the volume of the gas be at a pressure of 0.987atm if temperature remains constant?144
12)A gas with pressure of 1.26atm and volume of 7.4L is compressed to 2.93L.What’sthenew pressure?3.2
13)A sample of 50.0mL of oxygen has a pressure of 2.2 atm. If the pressure is changed to 5.2 atm, what is the new volume of the gas?21
14)A flask containing 95.0mL of hydrogen was collected under a pressure of 1.2 atm. At what pressure will the volume be 50.0mL?2.3
15)The pressure exerted on a 240.0mL sample of hydrogen gas at constant temperature is increased from 0.428atm to 0.724atm. What will the final volume of the sample to be?142
16)A flask containing 155.0mL of hydrogen was collected under a pressure of 22.5kPa. What pressure would be required for the volume of the gas to be 90.0mL, assuming the same temperature?38.8
17)P1= 350.0torrV1=200.0mLP2=700.torrV2=?100.
18)P1=0.75atmV1=?P2=0.48atmV2=435.0mL280
19)P1=?V1=2.4LP2=180mmHgV2=1.8L140
20)A sample of oxygen that occupies 1,000,000.0mL at 0.75atm is subjected to a pressure of 1.25atm. What will the final volume of the sample be if the temperature is held constant?6.0x105
Charles Law(V1/T1=V2/T2) °C+273=KShow Work, Units+sub, sigfigs, circle answers
21)To what temperature must a sample of nitrogen gas at 25.0C and 800.0mL be heated so that its volume increases to 135.0mL?50.3
22)A cylinder of helium outside in the sun has a volume of 5.0mL and a temperature of 50.0C. If the cylinder is taken indoors and cooled to 21.0C, what will its new volume be?4.6
23)If the temperature of a gas is 2.0C and the temperature is changed so the gas volume doubles, what is the new temperature of the gas?550.
24)250.0mL oxygen is collected at 20.0C. What volume is it if temperature is increased to 50.0C?276
25)An air sample has a volume of 140.0mL at 67.0C. If volume is reduced to 50.0mL at constant pressure, what is the temperature?121
26)A helium-filled balloon has a volume of 3.75L at 25.0C. The volume of the balloon decreases to 2.46L after it is taken outside on a winter day. What is the temperature outside?195
27)500.0 mL of oxygen is collected at 25˚C. What’s the volume if temperature is increased to 50˚C?542
28)A gas occupies a volume of 560.0 cm3 at a temperature of 120˚C. In˚C, to what temperature must the gas be lowered if it is to occupy 400.0 cm3? 8.0
29)Suppose 100.0 mL of nitrogen is collected at -10.0˚C. If the temperature of the gas is increased to 60.0˚C, how much will the gas increase in volume? 127
30)A helium-filled balloon has a volume of 2.75 L at 20.0˚C. The volume of the balloon decreases to 2.46 L after it is taken outside on a winter day. What is the outside temperature? 262
Gay-Lussac’s Law (P1/T1=P2/T2) °C+273=K Show Work, Units+sub, sigfigs, circle answers
31)The gas in an aerosol can is at a pressure of 3.0atm at 25.0°C. What would the gas pressure be at 52.0°C?3.3
32)Before a trip from New York to Boston, the pressure on an automobile tire is 1.8atm at 20.0°C. At the end of the trip, the pressure gauge reads 1.9atm. What is the new temperature in the tires?310
33)At 120.0°C, the pressure of a sample of N2 is 1.07atm. What will the pressure be at 205.0°C, volume is constant?1.30
34)A sample of He gas has a pressure of 1.20atm at 22.0°C. At what temperature will the pressure be 2.00atm?492
35)A sample of N2 gas has a pressure of 0.23atm at 2.0°C. At what temperature will pressure be 1.05atm?1300
36)At 201.0°C, the pressure of a sample of nitrogen is 1.57atm. What will pressure be at 245.0°C, volume is constant?1.72
37)The gas in an aerosol can is at a pressure of 2.1atm at 20.0°C. What would the gas pressure be at 72.0°C?2.5
38)To what temperature must a sample of nitrogen gas at 25.0C and 0.800 atm be heated so that pressure increases to 1.35atm?503
39)A cylinder of helium outside in the sun has a pressure of 5.0atm and a temperature of 50.0C. If the cylinder is taken indoors and cooled to 21.0C, what is the new pressure?4.6
40)To what temperature must a neon sample gas at 5.0C and 0.38atm be heated so the pressure increases to 1.05atm?770
Combined Gas Law (P1V1/T1=P2V2/T2) °C+273=K Show Work, Units+sub, sigfigs, circle answers
41)A helium-filled balloon has a volume of 50.0L at 25.0C and 1.08atm. What volume will it have at 0.855atm and 10.0C?60.0
42)The volume of a gas is 27.5mL at 22.0C and 0.974atm. What will the volume be at 15.0C and 0.933atm?28.0
43)A 700.0mL gas sample at 25.0C and 1.00atm pressure is compresses to a volume of 200.0mL, and the temperature is increased to 30.0C. What is the new pressure of the gas?3.56
44)A sample of gas at 47.0C and 1.03atm occupies a volume of 2.20L. What volume would this gas occupy at 107.0C and 0.789atm?3.41
45)A 350.0mL air sample collected at 35.0C has a pressure of 550.0torr. What pressure will the air exert if it is allowed to expand to 425mL at 57C?485
46)A gas measures 1.75L at -23.0C 150.0kPa. At what temperature would the gas occupy kPa?260
47)A sample of oxygen at 40.0C occupies 820.0mL is at 1.00 atm. If this sample later occupies 1250mL at 60.0C, what is the new pressure?0.698
48)A balloon filled with 75.0mL of helium gas has a pressure of 2.1atm when the temperature is 30.0°C, what will the volume be if the balloon is submerged in water where the pressure is increased to 3.0atm and the temperature is 20.0°C?51
49)A sample of neon gas has a volume of 2.0L at 19.0°C and has a pressure of 1.0atm. What will the new pressure be if it is heated to 38.0°C and now occupies a volume of 5.1L?0.42
50)150mL gas sample at 45.0C and 1.9atm pressure is compresses to a volume of 75mL, and the pressure is increased to 4.1 atm. What is the new temperature of the gas? 340
Ideal Gas Law (PV=nRT) °C+273=K, R=0.0821(L∙atm)/(mol∙K) R=8.314(L∙kPa)/(mol∙K) Show Work, Units+sub, sigfigs, circle answers
51)What pressure, in atmospheres, is exerted by 0.325mol of hydrogen gas in a 4.08L container at 35.0°C?2.01
52)How many liters are occupied by 0.909mol of nitrogen at 125.0°C and 0.901atm pressure? 33.0
53)How many grams of carbon dioxide gas are there in a 45.1L container at 34.0°C and 1.04atm?81.9
54)A sample that contains 4.38mol of a gas at 250.0K has a pressure of 0.857atm. What is its volume?105
55)A sample of carbon dioxide with a mass of 0.301g was placed in a 250.0mL container at 400.0K. What pressure in atmospheres is exerted by the gas? 0.898
56)A gas sample occupies 8.77L at 20.0°C. What is the pressure in atmospheres, given that there are 1.45mol of a gas in the sample? 3.98
57)What is mass, in grams, of oxygen gas in a 12.5L container at 45.0°C and 7.22atm? 111
58)How many moles of argon are there in 20.0 L, at 25°C and 96.8 kPa? 0.781
59)A polyethylene plastic weather balloon contains 65 L of helium, which is at 20.0°C and 94.0 kPa. How many grams of helium are in the balloon? 10.
60)What volume would 10.0 grams of helium occupy in the stratosphere at -61°C and 1.1x103 Pa?4.0X103
Dalton’s Law of Partial Pressure (Ptot=P1+P2+P3…)Show Work, Units+sub, sigfigs, circle answers
61)A mixture of neon, oxygen, and nitrogen gases has a total pressure that reads 10.0atm. If the partial pressure of neon is 4.1atm and the partial pressure of oxygen is 0.78atm, what is the partial pressure of the nitrogen gas? 5.1
62)The partial pressure of nitrogen gas in a sample is 500.mmHg and the partial pressure of water vapor in the same sample is 120.mmHg, what is the total pressure of the sample of gas? 620.
63)In a sample of gas containing carbon dioxide, nitrogen, and oxygen at 1.000 atm pressure, the partial pressure of carbon dioxide is 0.124atm and the partial pressure of nitrogen is 0.602atm, what is the pressure of the oxygen? 0.274
64)A container of gas contains water vapor, neon gas and hydrogen gas. The total pressure of the container is 780.mmHg. The pressure of the water vapor is 590.mmHg and the pressure of the neon gas is 100. mmHg, what is the pressure of the hydrogen gas? 90.
65)A metal tank contains three gases: oxygen, helium, and nitrogen. If the partial pressures of the three gases in the tank are 35 atm of O2, 5 atm of N2, and 25 atm of He, what is the total pressure inside of the tank? 65 atm
66)Blast furnaces give off many unpleasant and unhealthy gases. If the total air pressure is 0.99 atm, the partial pressure of carbon dioxide is 0.05 atm, and the partial pressure of hydrogen sulfide is 0.02 atm, what is the partial pressure of the remaining air? 0.92 atm
67)Oxygen gas from the decomposition of KClO3 was collected by water displacement. The barometric pressure and temperature during the experiment were 731.0 torr and 20.0⁰C, respectively. What was the partial pressure of the O2 collected? (⁰C=17.5 torr) 713.5
68)Some H2 gas is collected over water at 20.0⁰C. The levels of water inside and outside the gas-collection bottle are the same. The partial pressure of H2 is 742.5 torr. What is the barometric pressure at the time the gas is collected? (⁰C=17.5 torr) 760.0
69)A sample of N2 gas is collected over water at a temperature of 23.0⁰C. What is the pressure of the N2 gas is the atmospheric pressure is 785mmHg? (⁰C=21.1 mmHg) 764
70)A sample of gas is collected over water at a temperature of 35.0⁰C when the barometric pressure reading is 742.0 mmHg. What is the partial pressure of the dry gas? (⁰C=42.2 mmHg) 699.8
Avogadro’s Law (Molar Volume)Show Work, Units+sub, sigfigs, circle answers
71)Hydrochloric acid can be produced by a reaction between hydrogen gas and chlorine gas.
a)Write a balanced equation for this reaction. (*remember diatomics)
b)How many liters of hydrogen are needed to produce 1.75 L Hydrochloric acid? 0.875
c)How many moles of chlorine would be needed to react with 8.65 mol of hydrogen? 8.65
72)Propane, C3H8, is used for cooking and heating.
a)Write a balanced equation: Propane burns in oxygen, producing carbon dioxide and water vapor.
b)How many liters O2 would be needed to completely combust 0.350 L of propane? 1.75
c)How many liters of water vapor would be produced from of 0.350 L of propane? 1.40
Gas StoichiometryShow Work, Units+sub, sigfigs, circle answers
PV=nRT °C+273=K 1mol=22.41L@STP R=0.0821(L∙atm)/(mol∙K) R=8.314(L∙kPa)/(mol∙K)
73)Ammonia is oxidized to form nitrogen monoxide and water: 4NH3(g)+5O2(g)→4NO(g)+6H2O(l)
a)What volume of oxygen will be used in a reaction of 2800L NH3 under the same conditions? 3500
b)What volume of NO will be produced in a reaction of 2800L NH3 under the same conditions? 2800
74)Fluorine gas reacts violently with water to produce hydrogen fluoride and ozone:
3F2(g)+3H2O(l)→6HF(g)+O3(g)
a)What volume of O3 gas would be produced by the complete reaction of 3.60x104mL of fluorine gas? All gases are measured under the same conditions. 1.20x104 mL
b)What volume of HF gas would be produced by the complete reaction of 3.60x104mL of fluorine gas? All gases are measured under the same conditions.7.20x104 mL
75)Ethanol burns in O2 to form CO2 and H2O. C2H5OH+3O2→2CO2+3H2O If the combustion uses 55.8mL O2 measured at 2.26atm and 40⁰C, what volume of CO2 is produced when measured at STP?0.0733 L
76)What volume of oxygen, collected at 25°C and 101kPa, can be prepared by decomposition of 37.9 g of potassium chlorate? 2KClO3(s)2KCl(s)+3O2(g) 11.4
77)Magnesium will burn in oxygen to form magnesium oxide: 2Mg(s)+O2(g)2MgO(s) What mass of Mg will rxt with 500.0mL oxygen at 150.0°C and 70.0kPa? 0.484
78)Aluminum reacts with chlorine to produce aluminum chloride. (1kg=1000g) (1L=1000mL)
a)Write the balanced equation.
Mass Al / Volume Cl2 / Conditions / Mass AlCl3 / answersb / 1.559kg / ? L / 20.°C & 0.945 atm / NA / 2210
c / Excess / 920. L / STP / ? g / 3650
d / ? g / 1.049 mL / 37.0°C & 5.00atm / NA / 0.00371
79)The industrial production of ammonia: N2(g) + 3H2(g) → 2NH3(g)
a)What volume of nitrogen at STP is needed to react with 57.0mL of hydrogen measured at STP?19.0
b)If 20.0mol of nitrogen is available, what volume of NH3 at STP can be produced? 897
c)What volume of H2 @STP will be needed to produce 800.L ammonia at 55⁰C + 0.900 atm?899
80)Carbon monoxide will burn in air to produce CO2. 2CO(g)+O2(g)→2CO2(g) What volume of oxygen at STP will be needed to react with 3500. L of CO measured at 20.⁰C and a pressure of 0.953 atm?1550
81)Sodium reacts vigorously with water to produce hydrogen and sodium hydroxide. 2Na(s)+2H2O(l)→2NaOH(aq)+H2(g) If 0.027g of sodium reacts with excess water, what volume of hydrogen at STP is formed? 0.013
82)Methanol, CH3OH, is made by using a catalyst to react carbon monoxide with hydrogen. Assuming that 450.0mL CO and 825mL H2 are allowed to react at the same temperature and pressure:
a)Write the balanced equation. (*remember diatomics)
b)Which reactant is in excess? CO
c)What volume of CH3OH(g) is produced (TY)? 413
d)How much of that reactant remains when the reaction is complete? 37.5
Gases Test Review
Show Work, substance and unit on every number, sig figs, circle answers.
83)What are the 6 properties of gases?
84)Is there a direct or inverse relationship between the volume and pressure of a gas? Explain.
85)Is there a direct or inverse relationship between the volume and temperature of a gas? Explain.
86)Is there a direct or inverse relationship between the pressure and temperature of a gas? Explain.
87)A 760mL gas sample at 24.0C and 1.0 atm pressure is compresses to a volume of 220mL, and the temperature is increased to 40.0C. What is the new pressure of the gas? 3.6
88)A helium-filled balloon has a volume of 5.0L at 35C and 1.68atm. What volume will it have at 2.855atm and 15C? 2.8
89)A gas occupies 1.72L@23C & 150.kPa. At what temperature would the gas occupy 1.30L@212kPa?316
90)A sample of helium gas has a pressure of 1.0atm at 12°C. At what temperature will the helium reach a pressure of 2.50atm? 710
91)A cylinder of helium outside in the sun has a volume of 5.0L and a temperature of 56C. If the cylinder is taken indoors and cooled to 31C, what will its new volume be? 4.6
92)A sample of 500.mL of oxygen has a pressure of 2.13atm. If the pressure is changed to 4.2atm, what is the new volume of the gas? 250
93)The gas in an aerosol can has a pressure of 3.5atm at 21°C. What is the gas pressure at 42°C? 3.8
94)A gas has a pressure of 2.26atm and a volume of 3.4L. If the gas is compressed to a volume of 2.33L what will its pressure be? 3.3
95)To what temperature must a sample of nitrogen gas at 35C and 850mL be heated so that its volume increases to 935mL? 340
96)How many moles of air are in 1.00L at -23⁰C and 101KPa?0.0486
97)How many grams of argon are there in 20.0L at 25⁰C and 96.8KPa? 31.2
98)In a sample of gas containing carbon dioxide, nitrogen, and oxygen at 1.000atm pressure, the partial pressure of carbon dioxide is 0.792atm and the partial pressure of nitrogen is 0.202atm, what is the pressure of the oxygen? 0.006
99)Suzie collects hydrogen gas over water at 29⁰C (30.0mmHg) at sea level where the pressure is 761mmHg. What is the pressure of the hydrogen gas in the tube? 731
100)If measured at the same temperature and pressure what volume of O2 is needed to make 492L of H2O according to the reaction? 2C8H18(l) + 25O2(g) → 16CO2(g) + 18 H2O(g) 683
101)Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both energy and gas bubbles, which help clear the drain clog. The reaction is:
2NaOH(aq) + 2Al(s) +6H2O(l) → 2NaAl(OH)4(aq) +3H2(g)
What mass of aluminum would be needed to produce 4.00L of hydrogen gas at STP? 3.21
102)Air bags in cars are inflated by the sudden decomposition of sodium azide, NaN3, by the following reaction: 2NaN3(s) →3N2 (g) + 2Na(s)What volume of N2 gas, measured at 1.30 atm and 87.0⁰C, would be produced by the reaction of 70.0 g of NaN3? 36.7
103)Assume that 13.5g Al react with react with HCl at STP: 2Al(s)+6HCl(aq)→2AlCl3(aq)+3H2(g)
- How many moles of H2 are produce?0.751
- How many liters of H2 @STP are produced?16.8
104)Silicon tetrafluoride gas can be produced by the following equation: SiO2(s)+4HF(g)→SiF4(g)+2H2O(l)
If 1.00L of HF gas under pressure at 3.48atm and a temperature of 25⁰C reacts completely with SiO2 to form SiF4. What volume of SiF4 at 15⁰C and 0.940atm, is produced by this reaction? 0.894