Chapter 5, Problem 114AE

Interpretation Introduction

Interpretation: The molar enthalpy of combustion, fuel value and percentage of hydrogen by mass of the given hydrocarbons is to be calculated; also the relationship between hydrogen content and the fuel value is to be determined.

Concept Introduction: The molar enthalpy change of the given reaction is calculated by the difference of sum of the enthalpy change of products and reactants.

The fuel value of the given hydrocarbons is calculated by dividing its molar enthalpy of combustion by the molar mass.
The percentage hydrogen content of the hydrocarbon is calculated by dividing the molar mass of hydrogen in the given hydrocarbon by the molar mass of hydrocarbon and multiplying the resultant value by $100$ .

(a)

To determine: The molar enthalpy of combustion for the given hydrocarbons.

Step 1:

Interpretation Introduction

To determine: The molar enthalpy of combustion of 1,3-butadiene.

Step 2:

Interpretation Introduction

To determine: The molar enthalpy of combustion of 1-butene.

Step 3:

Interpretation Introduction

To determine: The molar enthalpy of combustion of n-butane.

(b)

Interpretation Introduction

To determine: The fuel value of the given hydrocarbons.

Step 1:

Interpretation Introduction

To determine: The fuel value of 1,3-butadiene.

Step 2:

Interpretation Introduction

To determine: The fuel value of 1-butene.

Step 3:

Interpretation Introduction

To determine: The fuel value of n-butane.

(c)

Interpretation Introduction

To determine: The percentage of hydrogen by mass in the given hydrocarbons.

Step 1:

Interpretation Introduction

To determine: The percentage of hydrogen by mass of 1,3-butadiene.

Step 2:

Interpretation Introduction

To determine: The percentage of hydrogen by mass of 1-butene.

Step 3:

Interpretation Introduction

To determine: The percentage of hydrogen by mass of n-butane.

(d)

Interpretation Introduction

To determine: The relationship between hydrogen content and the fuel value of given hydrocarbons.