Properties Of Gases
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Questions and Answers
- 1.
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- 2.
As the pressure increases on a gas, the volume of the gas ___________.
Explanation
When the pressure on a gas increases, the gas molecules are forced closer together. This reduces the space between the molecules, resulting in a decrease in volume. Therefore, as the pressure increases, the volume of the gas decreases.Rate this question:
- 3.
As the temperature of a gas increases, the volume of a gas ___________.
Explanation
As we add heat to a gas, the temperature increases, therefore increasing kinetic energy. As kinetic energy increases, this means the particles of the gases move faster, hitting the container wall more often (creating more pressure) and in turn expanding/increasing the volume.Rate this question:
- 4.
If the temperature of the gas is doubled, the volume of the gas will....
- A.
Decrease by a factor of 2
- B.
Decrease by a factor of 1/2
- C.
Increase by a factor of 2
- D.
Increase by a factor of 1/2
Correct Answer
C. Increase by a factor of 2Explanation
When the temperature of a gas is doubled, according to Charles's Law, the volume of the gas will also double. This is because as the gas molecules gain more energy from the increase in temperature, they move faster and collide with the container walls more frequently, causing the volume to increase. Therefore, the correct answer is that the volume of the gas will increase by a factor of 2.Rate this question:
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- 5.
If the pressure on a gas doubles, the volume of the gas will....
- A.
Double
- B.
Half
- C.
Not be effected
- D.
Quadruple
Correct Answer
B. HalfExplanation
When the pressure on a gas doubles, according to Boyle's Law, the volume of the gas will decrease by half. This is because as the pressure increases, the gas molecules are compressed closer together, resulting in a decrease in volume.Rate this question:
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- 6.
The force per unit are is known as the ___________.
Correct Answer
pressureExplanation
Pressure is defined as the force per unit area. It is a measure of the amount of force applied to a given area. When a force is applied to a surface, the pressure is the force distributed over that surface. It is calculated by dividing the force applied by the area over which it is applied. Therefore, pressure is the correct answer to the given question.Rate this question:
- 7.
The kinetic molecular theory states that (choose all that apply)....
- A.
All molecules of a substance stay in constant motion
- B.
All atoms or molecules of gases have no inter-molecular attractions
- C.
Gases will only take up a certain volume, and then stop diffusing
- D.
Gases have no set volume
- E.
Collisions between molecules are completely elastic (no energy is lost)
- F.
Gas molecules do not move
Correct Answer(s)
A. All molecules of a substance stay in constant motion
B. All atoms or molecules of gases have no inter-molecular attractions
D. Gases have no set volume
E. Collisions between molecules are completely elastic (no energy is lost)Explanation
According to the kinetic molecular theory:
All molecules of a substance stay in constant motion: This theory posits that gas molecules are always moving.
All atoms or molecules of a gas have no intermolecular attractions: Gas particles are assumed to move independently without attractive forces between them.
Collisions between molecules are completely elastic (no energy is lost): When gas molecules collide, they do so without losing energy, meaning the total kinetic energy remains constant.
Gases have no set volume: Gases expand to fill the volume of their container, meaning they do not have a fixed volume.Rate this question:
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- 8.
At Standard Temperature and Pressure (STP), the pressure is ________ atmosphere.
Correct Answer(s)
1Explanation
STP is a standardized set of conditions for measuring and comparing the properties of gases. The temperature at STP is defined as 0 degrees Celsius (273.15 Kelvin), and the pressure is set at 1 atmosphere (101.325 kPa). These conditions allow for consistent data comparison and reproducibility in scientific experiments.Rate this question:
- 9.
At absolute zero, particles of a gas _______________.
Correct Answer(s)
stop movingExplanation
Absolute zero, or 0 K, means there is no kinetic energy, or movement of molecules.Rate this question:
- 10.
The temperature at STP is __________ Celsius.
Correct Answer(s)
0Explanation
At Standard Temperature and Pressure (STP), the temperature is defined as 0 degrees Celsius (273.15 Kelvin) and the pressure is 1 atmosphere (101.325 kPa). STP is a reference point used in various scientific contexts, particularly in chemistry and physics, to allow for consistent conditions when comparing different sets of data or conducting experiments.Rate this question:
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Jul 09, 2024Quiz Edited by
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Sep 18, 2016Quiz Created by
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