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Which law can be used to calculate the number of moles of a contained gas when pressure, volume, and temperature are known?
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7. Gases
The Ideal Gas Law
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Which one of the following statements applies to an ideal gas?
A
The pressure of the gas is independent of temperature.
B
The gas particles lose energy during collisions.
C
The volume of the gas particles is significant compared to the volume of the container.
D
The gas particles do not exert attractive or repulsive forces on each other.
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Recall the key assumptions of the ideal gas model: ideal gases consist of particles that have negligible volume and do not exert forces on each other except during elastic collisions.
Analyze each statement in the problem by comparing it to the ideal gas assumptions:
1. "The pressure of the gas is independent of temperature" is incorrect because, according to the ideal gas law \(P V = n R T\), pressure depends on temperature.
2. "The gas particles lose energy during collisions" is incorrect because ideal gas collisions are perfectly elastic, meaning no energy is lost.
3. "The volume of the gas particles is significant compared to the volume of the container" is incorrect because ideal gas particles are considered point particles with negligible volume.
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