Chemical Kinetics Introduction

What is the area of chemistry concerned with reaction rates called?

The rate of a chemical reaction is determined solely by the increase in concentration of the products.

What formula expresses the rate of a chemical reaction?

In the reaction A → B, the concentration of A decreases during the time interval, therefore ∆[A] is a ______ quantity.

Match the following examples with their respective rates of reaction:

Which reaction would likely have the fastest rate?

Chemical kinetics only studies reactions that occur within a few seconds.

What does ∆c represent in the rate of reaction formula?

What is the average rate of formation of NO2 during the time period 300 – 400 s?

The concentration of NO2 increases with time as the reaction proceeds.

What is the molarity of O2 produced when [N2O5] = 1.20 × 10–2 mol L−1 at 300 s?

The molarity of NO2 produced per liter is calculated using the factor of _______ moles of NO2 per mole of N2O5.

Match the following terms with their definitions:

Which statement best explains why the rate of reaction decreases over time?

How is the average rate of O2 formation determined during a specific time period?

At time t = 350 s, the rate of formation of NO2 can be calculated using the initial concentration of N2O5.

What is the rate expression for the reaction 3O2(g) → 2O3(g)?

The rate of a reaction is always expressed as a positive quantity without needing adjustments for reactant disappearance.

If the rate of disappearance of I− is 2.0 × 10–5 mol L–1 s–1, what would be the rate of appearance of OI− in the reaction I−(aq) + OCl−(aq) → Cl−(aq) + OI−(aq)?

The rate of formation of N2 from the reaction 2NO(g) + 2H2(g) → N2(g) + 2H2O(g) can be expressed as ___.

Match the following reactions with their correct rate expressions:

For the reaction aA + bB → cC + dD, which expression correctly represents the rate?

An observable property that can indicate the rate of reaction must be something that can be directly calculated as a concentration.

What common observable properties can be used to determine the change in concentration over time?

What is the term for the minimum amount of energy needed for a reaction to occur?

Ineffective collisions can result in the formation of desired products.

What factor increases the reaction rate by causing particles to collide more frequently?

The reaction between an acid and a base, such as HCl and NaOH, occurs rapidly compared to the decomposition of ________.

Match the following reactions with their characteristics:

Which factor does NOT affect the rate of a chemical reaction?

Homogeneous reactions occur in different phases.

What type of collisions lead to reactions forming new products?

What type of reaction occurs only at the interface between two phases?

An increase in concentration of reactants generally decreases the rate of reaction.

What is the effect of temperature on the rate of reaction?

A __________ is a substance that increases the rate of a reaction by providing a different reaction mechanism with lower activation energy.

Match the following factors with their effects on reaction rates:

Which of the following statements is true regarding the effect of pressure on reaction rate?

Finely divided solids react more slowly than larger bodies of the same substance.

What is activation energy in the context of chemical reactions?

What is the initial rate of reaction calculated from?

According to collision theory, all collisions between molecules result in a reaction.

What must happen for a chemical reaction to take place according to collision theory?

The rate of reaction is directly proportional to the number of ______ per second.

At what time is the instantaneous rate of reaction calculated in the given example?

The slope of the tangent drawn to the curve represents the instantaneous rate of reaction.

In the provided gas-phase reaction, what compounds are being produced?