Question

Which scenarios contradict ideal gas characteristics, representing deviations from kinetic-molecular principles or exceptions to ideal gas behavior? Select 3 options.

a gas at very high temperatures, when gas particles are moving very quickly

a gas at very low volumes, when gas particles are very close together

a gas at very low temperatures, when gas particles have very little kinetic energy

a gas at very low pressures, when gas particles are very far apart

a gas with highly polar molecules that have very strong intermolecular forces

Answer 1

Answers:
- a gas at very low volumes, when gas particles are very close together
- a gas at very low temperatures, when gas particles have very little kinetic energy
- a gas with highly polar molecules that have very strong intermolecular forces

Why: Ideal gases assume negligible particle volume and no intermolecular forces, and that kinetic energy dominates. Low volume (high pressure) and low temperature increase the importance of finite size and intermolecular attractions (leading to non-ideal behavior and possible condensation). Strongly polar molecules have significant intermolecular forces, also causing deviations from ideal-gas behavior. High temperature and low pressure generally make real gases more nearly ideal.