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chapter 14 chem
Terms in this set (40)
Which of the following is the correct equation for the Z factor?
Z = PV/nRT
What is another name for gases that do not follow the ideal gas law?
both of these are correct
Which of the following is the greatest factor in producing non-ideal gas behavior?
What letter is used to define the gas compressibility factor in equations??
What letter is used to define the gas compressibility factor in equations?
Ideal Gas Law
At constant temperature, what happens to the pressure when the volume is doubled?
It is halved.
1000 mL of a gas at 15 atm is compressed to 500 mL. What is its new pressure?
A bag of chips has a volume of 2.0 L at 760 torr of pressure. What is its volume in an airplane flying at a high altitude with a pressure of 550 torr?
To use Boyle's Law, which of the following needs to remain constant?
Temperature and number of moles of a gas
A sample of hydrogen has a volume of 25 L under a pressure of 5 atm. What will the pressure of this gas be if the volume were decreased to 5 L?
A balloon has an initial volume of 150 mL at 25 degrees Celsius. If the temperature is increased to 75 degrees Celsius, what is the final volume?
A 4 L sample of gas is heated from 20 K to 200 K. What will its final volume be?
1000 mL of a gas is cooled from 500 K to 250 K. What is its final volume?
At constant pressure, what happens to the volume of a gas at 25° C, when the temperature doubles?
It is doubled.
To use Charles' Law, which of the following needs to remain constant?
Pressure and the number of moles of a gas
Assuming the volume is held constant, what happens to the pressure of a gas when the absolute temperature doubles?
It is doubled.
To use Gay-Lussac's Law, which of the following needs to remain constant?
If a gas with a pressure of 6 atmospheres is cooled from 500 K to 250 K, then what is its final pressure if the volume does not change?
A sample of an ideal gas is heated from 200 degrees Celsius to 400 degrees Celsius, while holding the volume constant. If the initial pressure is 45 torr, then what is the final pressure?
A 4 L sample of gas is heated from 20 K to 200 K. Its initial pressure was 60 torr, while the volume remained constant. What is its final pressure?
Assuming pressure and temperature are held constant, then what happens to the volume of a non-rigid container when the number of molecules in the container is doubled?
The volume doubles.
If a 22.4 L container is holding 1.00 mole of a gas at 273 kelvins, then what is its pressure?
Which of the following variables is NOT included in the ideal gas equation?
The ideal gas constant, R, can be found using which of the following equations?
R = (PV)/(nT)
Which units of pressure are needed if you are going to use 0.0821 as your ideal gas constant?
Why are the van der Waals constants a and b different for each gas?
Different gases have different sized molecules.
Which of these conditions is NOT considered 'non-ideal'?
Very high speeds
In the van der Waals equation, what does a represent?
The attraction between the gas molecules
What advantage does the van der Waals equation give us over the ideal gas law?
We can account for the behavior of gases under non-ideal conditions.
Why does the volume of gas particles become important when the volume of the container is decreased?
As the volume becomes less the gas particles take up more space relative to the overall volume.
A gas is collected by water displacement at 25 degrees Celsius. The vapor pressure of water at that temperature is 24 mmHg. If the atmospheric pressure is 800 mmHg, then what is the pressure of the dry gas you collected?
A sealed vessel contains 50% oxygen, 10% carbon dioxide, and 40% nitrogen gas. The total pressure of the gas mixture is 5 atmospheres. What is the partial pressure of the carbon dioxide?
One-third of a gaseous mixture is nitrogen and 2/3 of the gas is helium. The total pressure in the container is 3 atmospheres. What is the partial pressure of the nitrogen?
A container holds a mixture of two different gases. The oxygen in a container exerts 80 mmHg of pressure on the inside of the container. The total pressure inside the container is 120 mmHg. What is the pressure of the other gas in the container?
Oxygen is collected in a test tube over 30 degree Celsius water. The vapor pressure of the water at that temperature is about 32 mmHg. If the atmospheric pressure is 640 mmHg, then what percentage of the gas in the test tube is oxygen?
The _____ states that gas particles are constantly moving in rapid, random movement.
kinetic molecular theory
Which of the following statements best represents Graham's Law?
The effusion rate of a gas is inversely proportional to the square root of its molecular mass.
Mark has unknowingly driven over a very large nail when exiting his work parking lot. He has a long commute home, and by the time he arrives he will have a flat tire. The air that is slowly escaping from the hole in his tire is an example of _____.
Dana has placed a few drops of food coloring in a mixture of water and vinegar to dye hard-boiled eggs with her daughter in preparation for Easter. The food coloring changing the color of the water is an example of _____.
If carbon dioxide molecules effuse at an average rate of 5 mol/s, at what rate would diatomic hydrogen molecules effuse in the exact same conditions?
Recommended textbook explanations
Chemistry: Matter & Change, Florida
McLaughlin, Thompson, Zike
Sarquis, J., Sarquis, M.
Chemistry Matter and Change (California)
Dingrando, Gregg, Hainen, Wistrom
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