Multiple Choice
The urms of H2 molecules at 273 K is 1.84 × 10^3 m/s. At what temperature is the urms for H2 1.6 times greater than this value?
7. Gases
Kinetic Molecular Theory
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According to the Kinetic Molecular Theory, will a higher rate of diffusion occur in cold or hot temperatures?
A
Cold temperatures
B
Diffusion rate is the same at all temperatures
C
Hot temperatures
D
Temperature does not affect diffusion rate
Verified step by step guidance1
Understand the Kinetic Molecular Theory: This theory explains the behavior of gases, stating that gas particles are in constant, random motion and that their speed is related to temperature.
Recognize the relationship between temperature and kinetic energy: According to the theory, the average kinetic energy of gas particles is directly proportional to the temperature in Kelvin. As temperature increases, the kinetic energy of the particles also increases.
Relate kinetic energy to diffusion: Diffusion is the process by which gas particles spread out to evenly fill a container. The rate of diffusion depends on the speed of the gas particles, which is influenced by their kinetic energy.
Analyze the effect of temperature on diffusion: At higher temperatures, gas particles move faster due to increased kinetic energy, leading to a higher rate of diffusion. Conversely, at lower temperatures, particles move slower, resulting in a slower diffusion rate.
Conclude that higher temperatures lead to a higher rate of diffusion: Based on the Kinetic Molecular Theory, the correct answer is that a higher rate of diffusion occurs at hot temperatures.
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