Grade 11 note unit 4

    Master this deck with 14 terms through effective study methods.

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    What is chemical kinetics?

    Studies reaction rates and mechanisms.

    How is the rate of a reaction expressed?

    In terms of concentration change over time.

    What does a negative Δ[A] indicate?

    Concentration of A decreases over time.

    What is the average rate of reaction?

    Change in concentration over time.

    What is the instantaneous rate of reaction?

    Rate at a specific moment, found using a tangent.

    What is required for a chemical reaction to occur?

    Collisions between reactants.

    What distinguishes effective collisions from ineffective ones?

    Effective collisions result in product formation.

    What is activation energy?

    Minimum energy needed for a reaction to occur.

    How does temperature affect reaction rates?

    Higher temperatures increase kinetic energy and collision frequency.

    What role does surface area play in reaction rates?

    Larger surface area increases contact and reaction speed.

    How does concentration affect reaction rates?

    Higher concentration increases the rate due to more collisions.

    What is the effect of a catalyst on a reaction?

    Lowers activation energy and speeds up the reaction.

    What is the difference between homogeneous and heterogeneous reactions?

    Homogeneous reactions occur in one phase; heterogeneous in multiple phases.

    What happens to reaction rates when pressure increases for gases?

    Rate increases due to higher concentration of gas particles.