Chapter 6, Problem 6.46P

Interpretation Introduction

(a)

Interpretation:

The transition states in graph needs to be identified as endothermic or exothermic reactions.

Concept introduction:

Exothermic reaction releases heat as energy to the environment while endothermic reaction absorbs heat from the surrounding environment. This phenomenon makes significant differences in the energy diagram of these 2 reactions.

Interpretation Introduction

(b)

Interpretation:

By considering the amount of activation energy of the 2 reactions, the faster reaction can be selected.

Concept introduction:

Activation energy of a reaction is the amount of energy that must be provided to start a chemical reaction. Activation energy and the speed of a reaction are interrelated.

Interpretation Introduction

(c)

Interpretation:

The products in an energy diagram and the reaction coordinate needs to be determined.

Concept introduction:

Products of a chemical reaction is represented by the final point of the reaction coordinate axis of an energy diagram.

Interpretation Introduction

(d)

Interpretation:

The transition states in the energy diagram needs to be identified.

Concept introduction:

Transition state is the state relevant to the highest energy through the reaction coordinate.

Interpretation Introduction

(f)

Interpretation:

The change in enthalpy for the reaction needs to be labeled.

Concept introduction:

Enthalpy of a reaction is the energy change occurs in the system, during the particular reaction. Enthalpy of a reaction is measured as kilo Joules per mole (kJ mol-1) or kilo calories per mole (kcal mol-1).