Question

What factors affect reaction rates?

   What factors affect reaction rates?

Process Technology Equipment and Systems

Process Technology Equipment and Systems

Charles E. Thomas 4th Edition

Chapter 14, Problem 13

Instant Answer

Solved by Expert Lottie Adams

09/03/2020

Step 1

Nature of the reactants: The type of reactants involved in a chemical reaction can greatly affect the reaction rate. For example, reactions involving highly reactive substances or substances with a high surface area tend to have faster reaction rates. Show more…

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What factors affect reaction rates?

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Key Concepts

Catalysts

Catalysts affect reaction rates by providing an alternative pathway with a lower activation energy for the reaction. They increase the number of effective collisions without being consumed in the process, thus accelerating the overall reaction rate.

Surface Area

For reactions involving solids or heterogeneous mixtures, the surface area of a reactant plays a crucial role. A greater surface area allows more reactant particles to be exposed and available for collisions, thereby increasing the reaction rate.

Temperature

Temperature is a key factor affecting reaction rates because it influences the kinetic energy of molecules. Higher temperatures increase the energy and frequency of collisions between reacting particles, making it more likely that collisions will result in successful reactions by overcoming the activation energy barrier.

Concentration and Pressure

In reactions, especially those involving gases, higher concentrations or pressures lead to more frequent molecular collisions. This increased collision frequency enhances the rate at which reactions occur by raising the probability that reacting molecules will interact effectively.

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