Kinetics 1
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What is a catalytic converter and why is it used What is the reaction
Used to reduce levels of pollution in cars made from rhodium platinum and palladium alloys 2CO + 2NO —-> 2CO2 +N2
Uses of catalysts
Reduces the temperature saving money and energy Speeds up the reaction saving time and more efficient
Explain how a catalyst increase the rate of reaction
Provides an alternative pathway for reaction Reduces the activation energy Greater proportion of particles collide with sufficient energy
Define Rate-determining step
The slowest step in a reaction mechanism, which controls the overall rate.
Define Half-life (t₁/₂)
The time taken for the concentration of a reactant to decrease to half its initial value.
Define Rate constant (k)
The constant of proportionality in the rate equation. It depends on temperature and has units that vary depending on the order of reaction.
Define Rate equation
An equation that shows how the rate of reaction depends on the concentrations of reactants, e.g. rate = k[A]ᵐ[B]ⁿ
Define Rate of reaction
The change in concentration of a reactant or product per unit time.