Multiple Choice
Which of the following methods can increase the reaction rate of iron(III) oxide?
15. Chemical Kinetics
Factors Influencing Rates
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Which of the following factors does not affect the rate of diffusion?
A
Color of the substance
B
Temperature
C
Molecular size
D
Concentration gradient
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. It is driven by the concentration gradient and occurs until equilibrium is reached.
Identify factors that affect diffusion: The rate of diffusion is influenced by several factors, including temperature, molecular size, and concentration gradient. Each of these factors can either increase or decrease the rate at which diffusion occurs.
Analyze the effect of temperature: Higher temperatures increase the kinetic energy of molecules, causing them to move faster and thus increasing the rate of diffusion.
Consider the impact of molecular size: Smaller molecules move more easily and quickly through a medium, leading to a faster rate of diffusion compared to larger molecules.
Evaluate the role of concentration gradient: A steeper concentration gradient results in a faster rate of diffusion because there is a greater difference in concentration between two areas, driving the movement of particles more strongly.
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