Which of the following statements is true?
A)At a given temperature,lighter gas particles travel more slowly than heavier gas particles.
B)The smaller a gas particle,the slower it will effuse
C)The higher the temperature,the lower the average kinetic energy of the sample.
D)At low temperatures,intermolecular forces become important and the pressure of a gas will be lower than predicted by the ideal gas law.
E)None of the above statements are true.

Question

Quizplus · Accepted Answer

At low temperatures, gas particles move more slowly and are closer together, making intermolecular forces more significant. This causes a decrease in pressure compared to what is predicted by the ideal gas law, making statement D true. Statement A is false; according to Graham's law, lighter gas particles move faster than heavier gas particles at a given temperature. Statement B is false; smaller gas particles effuse faster than larger gas particles. Statement C is false; higher temperature means higher average kinetic energy of the sample.

Which of the Following Statements Is True