Multiple Choice
The rate of effusion of oxygen compared to an unknown gas is 0.935. What is the molar mass of the unknown gas?
7. Gases
Effusion
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Which of the following statements about diffusion is correct?
A
Diffusion occurs faster at higher temperatures due to increased particle movement.
B
Diffusion is the movement of particles from an area of lower concentration to an area of higher concentration.
C
Diffusion only occurs in gases and not in liquids or solids.
D
Diffusion requires an external energy source to occur.
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the process by which particles move from an area of higher concentration to an area of lower concentration, not the other way around.
Consider the effect of temperature on diffusion: At higher temperatures, particles have more kinetic energy, which increases their movement and speeds up the diffusion process.
Evaluate the states of matter: Diffusion can occur in gases, liquids, and solids, although it is most rapid in gases due to the greater freedom of movement of particles.
Assess the energy requirement: Diffusion is a spontaneous process that does not require an external energy source; it occurs due to the natural movement of particles.
Identify the correct statement: Based on the understanding of diffusion, the statement 'Diffusion occurs faster at higher temperatures due to increased particle movement' is correct.
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