Chem 112 - Chapter 14 - Kinetics

What two conditions must be met for a collision to be effective?

Molecules must collide with sufficient energy and with the correct orientation

List the five major factors that affect reaction rate.

Concentration, temperature, nature of reactants, reaction mechanism, catalyst

How is reaction rate defined?

Rate = Δ[A] / Δt (change in concentration over time)

What is the initial rate?

The instantaneous rate at t = 0, the maximum rate

For aA + bB → cC + dD, what is the general rate expression?

Rate = −(1/a)(Δ[A]/Δt) = −(1/b)(Δ[B]/Δt) = (1/c)(Δ[C]/Δt) = (1/d)(Δ[D]/Δt)

What is a rate law?

The relationship between reaction rate and reactant concentrations raised to powers (orders)

What is overall reaction order?

 The sum of the exponents in the rate law

What does it mean if a reactant has order zero?

Changing its concentration does not affect the rate

What are the units of k for a first‑order reaction?

1/time

If doubling a reactant doubles the rate, what is the order?

First order