Unit 5 AP Chemistry Kinetics

What is the formula for calculating the rate of a chemical reaction?

• Rate = [A]/t

• Rate = t/[A]

• Rate = [A]t

• Rate = [A]+t

Tags

NGSS.HS-PS1-5

Consider the reaction: 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g). If the rate of disappearance of NH₃(g) is 0.64 M s⁻¹, what is the rate of disappearance of O₂(g)?

• 0.80 M s⁻¹

• 0.64 M s⁻¹

• 0.32 M s⁻¹

• 0.16 M s⁻¹

Tags

NGSS.HS-PS1-7

Which factor increases the chance of a collision between reacting particles?

• Lower temperature

• Higher molarity

• Smaller surface area

• Absence of catalysts

Tags

NGSS.HS-PS1-5

Fill in the blank: Higher temperature means that particles are more likely to collide with energy that is _______ the activation energy.

• less than

• equal to

• greater than

• unrelated to

Tags

NGSS.HS-PS1-5

What does the rate law express in a chemical reaction?

• The speed of the reaction

• The concentration of reactants

• The temperature of the reaction

• The color of the reactants.

Tags

NGSS.HS-PS1-5

• The speed of the reaction

• The order of the reaction

• The temperature of the reaction

• The color of the reactants.

Tags

NGSS.HS-PS1-5

Fill in the blank: If doubling the initial concentration of a reactant causes the initial rate to quadruple, the reaction is ______ order in that reactant.

• first

• second

• third

• zero

Tags

NGSS.HS-PS1-5

What is the rate law expression for a first-order reaction with respect to reactant A?

• rate = k[A]

Tags

NGSS.HS-PS1-5

Fill in the blank: The first-order integrated rate law equation is ln[A]_t - ln[A]_0 = ___.

• kt

• -kt

• k/t

• -k/t

Tags

NGSS.HS-PS1-5

What is the relationship between the slope of the ln[A] versus time plot and the rate constant (k) for a first-order reaction?

• The slope is equal to k

• The slope is the negative of k

• The slope is the reciprocal of k

• The slope is unrelated to k