Avogadro's Law is correctly represented by which of the following statements?

The correct answer is Equal volumes of gases at the same temperature and pressure contain an equal number of molecules..

Key Points

• Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.
• This law helps explain the behavior of gases under different conditions, establishing a relationship between volume and the number of gas molecules.
• It is mathematically expressed as V ∝ n (where V is volume and n is the number of moles of gas).
• Avogadro's Law is fundamental to understanding ideal gas behavior and is used in deriving the Ideal Gas Law.

Additional Information

• Ideal Gas Law
  • The Ideal Gas Law combines Avogadro's Law, Boyle's Law, and Charles's Law into one equation: PV = nRT.
  • Here, P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin.
  • This law assumes that gases behave ideally, meaning they have no intermolecular forces and occupy no volume.
• Boyle's Law
  • Boyle's Law states that the pressure of a gas is inversely proportional to its volume when temperature and the number of moles are constant: P ∝ 1/V.
  • It explains how gas pressure increases when the volume decreases, provided the temperature remains unchanged.
• Charles's Law
  • Charles's Law states that the volume of a gas is directly proportional to its temperature when pressure and the number of moles are constant: V ∝ T.
  • This law indicates that gas volume increases with an increase in temperature, provided pressure is constant.
• Gas Constant (R)
  • The gas constant (R) is a proportionality constant in the Ideal Gas Law, with a value of 8.314 J/(mol·K).
  • R is essential for calculations involving the Ideal Gas Law, linking pressure, volume, temperature, and the number of moles.