Which laws can be combined to form the ideal gas law?
Boyle’s law and Charles’s law
Gay-Lussac’s law and Avogadro’s law
Charles’s law, Avogadro’s law, and Boyle’s law
Dalton’s law, Gay-Lussac’s law, and Avogadro’s law
The correct answer and explanation is:
The correct answer is C) Charles’s law, Avogadro’s law, and Boyle’s law.
The Ideal Gas Law combines three fundamental gas laws: Boyle’s law, Charles’s law, and Avogadro’s law. These laws describe how gases behave under different conditions of pressure, temperature, and volume. The Ideal Gas Law equation is written as:
PV=nRTPV = nRT
Where:
- P is the pressure of the gas,
- V is the volume of the gas,
- n is the number of moles of the gas,
- R is the universal gas constant,
- T is the temperature of the gas (in Kelvin).
Here’s how each law contributes to the Ideal Gas Law:
- Boyle’s Law (P ∝ 1/V at constant T and n): Boyle’s law states that the pressure of a gas is inversely proportional to its volume when the temperature and the number of gas molecules are constant. This law explains how pressure increases when volume decreases and vice versa.
- Charles’s Law (V ∝ T at constant P and n): Charles’s law says that the volume of a gas is directly proportional to its temperature when pressure and the number of gas molecules are constant. As temperature increases, the gas molecules move faster and push out more, expanding the volume.
- Avogadro’s Law (V ∝ n at constant P and T): Avogadro’s law states that the volume of a gas is directly proportional to the number of moles of gas at constant temperature and pressure. This law implies that if you add more gas to a container, the volume increases if the pressure and temperature stay constant.
By combining these laws, the Ideal Gas Law can describe the relationship between pressure, volume, temperature, and the amount of gas, making it a powerful tool in thermodynamics and chemistry.