Take this Quiz: A-Level Chemistry: Kinetics and Rate Equations | Zestly

Question 1

In the reaction A + B -> C, the rate equation is determined to be rate = k[A][B]. If the concentration of A is doubled and the concentration of B is halved, how does the initial rate of reaction change?

Accepted Answer

The rate remains unchanged

Question 2

Which of the following statements correctly describe the effect of a catalyst on a reaction mechanism and the Maxwell-Boltzmann distribution?

Accepted Answer

A catalyst provides an alternative reaction pathway with a lower activation energy

Question 3

For a reaction with an overall order of 3, what are the units of the rate constant k, assuming concentration is measured in mol dm^-3 and time in seconds?

Accepted Answer

mol^-2 dm^6 s^-1

Question 4

Given the reaction 2X + Y -> Z, the following initial rate data was collected: [X]=0.1, [Y]=0.1, Rate=0.02; [X]=0.2, [Y]=0.1, Rate=0.08; [X]=0.1, [Y]=0.2, Rate=0.04. What is the rate equation?

Answer

rate = k[X]^2[Y]

Answer

rate = k[X][Y]^2

Answer

rate = k[X][Y]

Answer

rate = k[X]^2[Y]^2

Question 5

Which of the following are true regarding the Arrhenius equation $k = Ae^{-Ea/RT}$?

Answer

As temperature T increases, the rate constant k increases

Answer

The pre-exponential factor A represents the frequency of collisions with correct orientation

Answer

The activation energy Ea is inversely proportional to the rate constant k

Answer

The term $e^{-Ea/RT}$ represents the total number of particles in the system