Gas Laws: Boyle's and Charles' Laws

• The following are correct answers to multiple choice questions about gas laws

Boyle’s Law

• As pressure increases, volume decreases.
• If a gas has an initial volume of 4L at 2 atm, and the pressure increases to 4 atm, the volume decreases to 2L.
• Deep-sea divers use specialized gas tanks to prevent gas expansion due to pressure changes.
• If you squeeze an inflated balloon, volume decreases, and pressure increases.
• Sealed snack bags appear puffed up at high altitudes because external pressure decreases, causing internal gas to expand.

Charles' Law

• When the temperature of a gas increases, assuming pressure is constant, its volume increases.
• A hot air balloon rising when heated is an example of Charles' Law in daily life.
• If a balloon has a volume of 3.0 L at 300 K, and the temperature increases to 450 K, its new volume will be 4.5 L.
• Fishermen should avoid overinflating their inflatable boats in hot weather because the air inside will expand, possibly causing damage.
• A basketball left outside in the hot sun will expand and feel harder.

Gay-Lussac’s Law

• When the temperature of a gas increases at constant volume, its pressure increases.
• A car tire’s pressure increasing on a hot day exemplifies Gay-Lussac’s Law.
• If a gas at 300 K has a pressure of 2.5 atm, and the temperature increases to 600 K, the new pressure will be 5.0 atm.
• Aerosol cans are labeled with warnings against exposure to heat because high temperature increases gas pressure, risking explosion.
• Knowledge of Gay-Lussac’s Law helps improve safety in industries dealing with compressed gases by ensuring gases are stored in temperature-controlled environments.