Gas Laws Practice Problems - PowerPoint PPT Presentation

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Gas Laws Practice Problems

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Ammonia gas occupies a volume of 450. mL at 720. mm Hg. ... To what temperature in degrees Celsius should it be lowered to bring the volume to 200. mL? ... – PowerPoint PPT presentation

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Title: Gas Laws Practice Problems


1
Gas Laws Practice Problems
P1V1T2 P2V2T1
  • 1) Work out each problem on scratch paper.
  • 2) Click ANSWER to check your answer.
  • 3) Click NEXT to go on to the next problem.

CLICK TO START
2
QUESTION 1
  • Helium occupies 3.8 L at -45C. What volume will
    it occupy at 45C?

ANSWER
3
ANSWER 1
  • V1 3.8 L
  • T1 -45C 228 K
  • V2 ?
  • T2 45C 318 K

CHARLES LAW P1V1T2 P2V2T1 V2 5.3 L
NEXT
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4
QUESTION 2
  • Ammonia gas occupies a volume of 450. mL at 720.
    mm Hg. What volume will it occupy at standard
    pressure?

ANSWER
5
ANSWER 2
  • V1 450. mL
  • P1 720. mm Hg
  • V2 ?
  • P2 760. mm Hg

BOYLES LAW P1V1T2 P2V2T1 V2 426 mL
NEXT
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6
QUESTION 3
  • A gas at STP is cooled to -185C. What pressure
    in atmospheres will it have at this temperature
    (volume remains constant)?

ANSWER
7
ANSWER 3
  • P1 1 atm
  • T1 273 K
  • P2 ?
  • T2 -185C 88 K

GAY-LUSSACS LAW P1V1T2 P2V2T1 P2 0.32 atm
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8
QUESTION 4
  • A gas occupies 1.5 L at 850 mm Hg and 15C. At
    what pressure will this gas occupy 2.5 L at
    30.0C?

ANSWER
9
ANSWER 4
  • V1 1.5 L
  • P1 850 mm Hg
  • T1 15C 288 K
  • P2 ?
  • V2 2.5 L
  • T2 30.0C 303 K

COMBINED GAS LAW P1V1T2 P2V2T1 P2 540 mm Hg
NEXT
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10
QUESTION 5
  • Chlorine gas has a pressure of 1.05 atm at 25C.
    What pressure will it exert at 75C?

ANSWER
11
ANSWER 5
  • P1 1.05 atm
  • T1 25C 298 K
  • P2 ?
  • T2 75C 348 K

GAY-LUSSACS LAW P1V1T2 P2V2T1 P2 1.23 atm
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12
QUESTION 6
  • A gas occupies 256 mL at 720 torr and 25C. What
    will its volume be at STP?

ANSWER
13
ANSWER 6
  • V1 256 mL
  • P1 720 torr
  • T1 25C 298 K
  • V2 ?
  • P2 760. torr
  • T2 273 K

COMBINED GAS LAW P1V1T2 P2V2T1 V2 220 mL
NEXT
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14
QUESTION 7
  • At 27C, fluorine occupies a volume of 0.500 dm3.
    To what temperature in degrees Celsius should it
    be lowered to bring the volume to 200. mL?

ANSWER
15
ANSWER 7
  • T1 27ºC 300. K
  • V1 0.500 dm3
  • T2 ?C
  • V2 200. mL 0.200 dm3

CHARLES LAW P1V1T2 P2V2T1 T2 -153C (120 K)
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16
QUESTION 8
  • A gas occupies 125 mL at 125 kPa. After being
    heated to 75C and depressurized to 100.0 kPa, it
    occupies 0.100 L. What was the original
    temperature of the gas?

ANSWER
17
ANSWER 8
  • V1 125 mL
  • P1 125 kPa
  • T2 75C 348 K
  • P2 100.0 kPa
  • V2 0.100 L 100. mL
  • T1 ?

COMBINED GAS LAW P1V1T2 P2V2T1 T1 544
K (271C)
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18
QUESTION 9
  • A 3.2-L sample of gas has a pressure of 102 kPa.
    If the volume is reduced to 0.65 L, what pressure
    will the gas exert?

ANSWER
19
ANSWER 9
  • V1 3.2 L
  • P1 102 kPa
  • V2 0.65 L
  • P2 ?

BOYLES LAW P1V1T2 P2V2T1 P2 502 kPa
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20
QUESTION 10
  • A gas at 2.5 atm and 25C expands to 750 mL after
    being cooled to 0.0C and depressurized to 122
    kPa. What was the original volume of the gas?

ANSWER
21
ANSWER 10
  • P1 2.5 atm
  • T1 25C 298 K
  • V2 750 mL
  • T2 0.0C 273 K
  • P2 122 kPa 1.20 atm
  • V1 ?

COMBINED GAS LAW P1V1T2 P2V2T1 V1 390 mL
EXIT
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