Which of the following statements is true of Charles's law, ?
A) The volume of a gas varies proportionally with pressure.
B) The volume of a gas sample varies directly with the absolute temperature.
C) All gas samples of the same volume at STP contain the same number of atoms.
D) The pressure of a gas sample varies inversely with volume.
E) All gas samples of the same volume at STP contain the same number of molecules.

Question

Which of the following statements is true of Charles's law,  ?
A) The volume of a gas varies proportionally with pressure. 
B) The volume of a gas sample varies directly with the absolute temperature. 
C) All gas samples of the same volume at STP contain the same number of atoms. 
D) The pressure of a gas sample varies inversely with volume. 
E) All gas samples of the same volume at STP contain the same number of molecules.

Quizplus · Accepted Answer

Charles's law states that the volume of a gas sample varies directly with the absolute temperature, when pressure and amount of gas are held constant. This means that as the temperature increases, the volume of the gas sample also increases. Thus, choice B is the correct statement of Charles's law. Choices A, C, and D describe other gas laws (Boyle's law, Avogadro's law, and Gay-Lussac's law, respectively). Choice E is not a law, but rather a statement about the behavior of gases at STP (standard temperature and pressure).

Which of the Following Statements Is True of Charles's Law