GED Science TestPhysical ScienceEasy
A scientist is investigating the relationship between the volume and temperature of a gas. They observe that as the temperature of a fixed amount of gas increases, its volume also increases, assuming the pressure remains constant. Which gas law describes this relationship?
- ACharles's Law
- BGay-Lussac's Law
- CBoyle's Law
- DAvogadro's Law
Show answer & explanationAnswer & explanation
Correct answer: A. Charles's Law
Charles's Law states that for a fixed amount of gas at constant pressure, the volume is directly proportional to its absolute temperature. This means as temperature increases, volume increases.
Why the other options are wrong
- B. Gay-Lussac's Law relates pressure and temperature (directly proportional) at constant volume.
- C. Boyle's Law relates pressure and volume (inversely proportional).
- D. Avogadro's Law relates volume and the number of moles of gas at constant temperature and pressure.
Charles's Law
Charles's Law states that for a fixed mass of gas at constant pressure, the volume is directly proportional to its absolute temperature.
- V₁/T₁ = V₂/T₂
- Temperature must be in Kelvin
- Pressure and amount of gas are constant
Memory trick: Charles's TV is always On (Temperature-Volume)