Multiple Choice
Why does a sealed bag of chips expand when you take it to a higher altitude?
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7. Gases
The Ideal Gas Law
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Under which conditions of temperature and pressure would a gas behave most like an ideal gas?
A
High temperature and high pressure
B
Low temperature and low pressure
C
Low temperature and high pressure
D
High temperature and low pressure
Verified step by step guidance1
Recall that an ideal gas is a theoretical gas composed of many randomly moving point particles that interact only through elastic collisions, with no intermolecular forces and negligible volume of particles.
Understand that real gases deviate from ideal behavior due to intermolecular attractions and the finite volume of gas particles, especially at low temperatures and high pressures.
Recognize that at high temperatures, gas particles have more kinetic energy, which overcomes intermolecular attractions, making the gas behave more ideally.
Note that at low pressures, gas particles are far apart, so the volume of the particles themselves and intermolecular forces have less effect, promoting ideal gas behavior.
Combine these insights to conclude that gases behave most like ideal gases under conditions of high temperature and low pressure.
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