Under which condition does a real gas behave more like an ideal gas?

• A. At high density
• B. At low pressure
• C. At low temperature
• D. At high pressure

Answer: (B)

Verified step by step guidance

1. 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.
2. Understand that real gases deviate from ideal behavior due to intermolecular forces and the finite volume of gas particles, especially under conditions where particles are close together.
3. Recognize that at low pressure, gas particles are far apart, so intermolecular forces and particle volume have minimal effect, making the gas behave more like an ideal gas.
4. Note that at high pressure or high density, particles are closer, increasing interactions and volume effects, causing deviations from ideal gas behavior.
5. Similarly, at low temperature, particles move slower and attractions become more significant, leading to non-ideal behavior; thus, low pressure is the condition where real gases behave most ideally.