Gas Laws

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Gas Laws

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The Gas Laws

In this section use Boyles, Charles, Gay-Lussac or the Combined Gas law to solve.

A container has a pressure of 210 kPa at a temperature of 25C. What would be the new pressure if the temperature increases to 75C? *

Don't forget to convert celsius to Kelvin for ALL gas law problems.

2 points

180 kPa

245 kPa

360 kPa

410 kPa

A flexible container has a volume of 35 liters at a temperature of 125C. What would be the new volume if the temperature dropped to 75C? *

2 points

11 liters

24 liters

31 liters

40 liters

A giant Santa balloon has a volume of 335 liters at a temperature of 20C and a pressure of 210 kPa. What would be the new pressure if the temperature dropped to -20C? *

2 points

59 kPa

102 kPa

154 kpa

181 kPa

A balloon has a pressure of 300 kPa and a volume of 40 liters. What would be the new volume if the pressure doubled? *

2 points

10 liters

20 liters

80 liters

160 liters

A flexible container has a volume of 100 liters, a pressure of 95 kPa at a temperature of 298K. What is the new pressure if the volume changed to 50 liters and the temperature changed to 200K? *

2 points

23 kPa

65 kPa

128 kPa

178 kPa

Ideal Gas Law

Use the ideal gas law to answer the following.

How many moles of a gas would be in a 15 liter container with a pressure of 100 kPa and a temperature of 300K? *

R=8.31 if pressure is in kPa. Or 0.082 if pressure is in atm.

2 points

0.6 mols

1.2 mols

1.8 mols

2.4 mols

What is the volume of 2 moles of a gas at STP? *

STP values are on the back of your periodic table.

2 points

11.2 liters

22.4 liters

44. 8 liters

56.0 liters

What is the pressure of 12 grams of NH3 if it is in a 20 liter container at 298K? *

2 points

23 kPa

44 kPa

87 kPa

112 kPa

What is the molar mass of 25 grams of gas if it is in a 35 liter container at STP? *

2 points

Dalton's and Graham's Laws

Use Dalton or Graham's Law to solve the following.

A scuba tank with a total pressure of 200 kPa contains 140 kPa of N2, 55 kPa of O2, and some Argon. What is the partial pressure of the Argon? *

2 points

200 kPa

140 kPa

55 kPa

5 kPa

You collected some H2 gas using a Eudiometer tube run through water. If the atmospheric pressure was 101.9 kPa and the vapor pressure of water at that temperature was 3.0 kPa, what was the pressure of the H2 you collected? *

2 points

98.9

104,9

112. 9

Not enough info

Which of the following would diffuse faster, a molecule of N2, a molecule of O2, or an atom of Xe? *

2 points

All the same speed

Between NH3 and N2, calculate which molecule would move faster and by how much? *

0 points

N2 is 0,8 times faster

NH3 is 0.8 times faster

N2 is 1.3 times faster

NH3 is 1.3 times faster

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