Factors Affecting Reaction Rates
This page delves deeper into how various factors influence the rate of chemical reactions by affecting molecular collisions.
Concentration: Increasing reactant concentration leads to more particles in a given volume, resulting in more frequent collisions and faster reaction rates.
Example: A diagram compares low and high concentration scenarios, showing more collisions in the higher concentration.
Temperature: Higher temperatures increase the average kinetic energy of particles, leading to more energetic collisions and faster reaction rates.
Highlight: Temperature is a measure of the average kinetic energy of particles in a substance.
Pressure: For gaseous reactants, higher pressure means more particles in a given volume, increasing collision frequency and reaction rate.
Particle Size: Smaller particles have a larger surface area, providing more opportunities for collisions and increasing reaction rates.
Catalysts: These provide surfaces for reactions to occur and hold reactant molecules at favorable angles, increasing the likelihood of successful collisions.
Definition: A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.