Multiple Choice
Under which conditions of pressure and temperature does a real gas behave most like an ideal gas?
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7. Gases
The Ideal Gas Law Applications
Multiple Choice
Under which of the following conditions would a gas that typically behaves non-ideally be made to act more like an ideal gas?
A
At high temperature and low pressure
B
At low temperature and high pressure
C
At high temperature and high pressure
D
At low temperature and low pressure
Verified step by step guidance1
Recall that ideal gas behavior assumes negligible intermolecular forces and that gas particles occupy no volume. Non-ideal behavior arises when these assumptions fail, typically at high pressures and low temperatures.
Understand that increasing temperature provides gas particles with more kinetic energy, which helps overcome intermolecular attractions, making the gas behave more ideally.
Recognize that lowering pressure increases the volume available to gas particles, reducing the effect of their finite size and intermolecular forces, thus promoting ideal behavior.
Combine these insights: high temperature reduces intermolecular attractions, and low pressure reduces particle crowding, both pushing the gas toward ideal behavior.
Therefore, the condition 'high temperature and low pressure' is where a non-ideal gas is most likely to behave like an ideal gas.
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