Which law states that if a gas is constant, then its volume and pressure are inversely related?

Which law states that if a gas is constant, then its volume and pressure are inversely related?

• A. Charles's law
• B. Boyle's law
• C. Avogadro's law
• D. Ideal gas law

Answer: (A)

The law describing the inverse relationship between volume and pressure of a gas while keeping the temperature and amount of gas constant is Boyle's law. According to Boyle's law, as the volume of a gas increases, the pressure decreases proportionally, provided the temperature remains constant. This relationship is mathematically expressed as P1V1 = P2V2, illustrating that pressure (P) and volume (V) are inversely related.

In contrast, Charles's law focuses on the relationship between volume and temperature, stating that the volume of a gas increases with an increase in temperature at constant pressure. Avogadro's law relates to the volume of gas and the number of moles, asserting that equal volumes of gases at the same temperature and pressure contain an equal number of molecules. The ideal gas law combines these relationships into a single equation, but it does not specifically highlight the inverse relationship between volume and pressure that Boyle's law does.