Multiple Choice
Which of the following factors does not influence the rate of diffusion?
15. Chemical Kinetics
Factors Influencing Rates
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Which of the following factors will increase the rate of diffusion?
A
Decreasing the concentration gradient
B
Increasing the molecular weight of the diffusing substance
C
Decreasing the surface area available for diffusion
D
Increasing the temperature
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. The rate of diffusion is influenced by several factors.
Consider the effect of temperature: Increasing the temperature provides more kinetic energy to the particles, causing them to move faster. This increased movement enhances the rate of diffusion.
Analyze the concentration gradient: A higher concentration gradient means a larger difference in concentration between two areas, which typically increases the rate of diffusion. Decreasing the concentration gradient would slow down diffusion.
Evaluate the molecular weight: Heavier molecules move more slowly than lighter ones. Increasing the molecular weight of the diffusing substance would decrease the rate of diffusion.
Assess the surface area: A larger surface area allows more particles to diffuse at once, increasing the rate of diffusion. Decreasing the surface area would reduce the rate of diffusion.
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