Chapter 5, Problem 68QAP

Interpretation Introduction

(a)

Interpretation:

The balanced chemical equation for the combustion of octane to carbon dioxide and water is to be written.

Concept introduction:

Octane is an alkane containing eight carbon atoms. All alkanes undergo combustion, which is essentially the reaction with aerial oxygen (O₂ ) to produce carbon dioxide and water.

Interpretation Introduction

(b)

Interpretation:

The volume occupied by the gaseous carbon dioxide which is generated when a car does a 75-mile trip should be determined.

Concept introduction:

The mass of octane combusted during the 75-mile trip can be easily determined from the given density of octane. The number of moles of octane combusted and hence, the number of moles of carbon dioxide emitted can be obtained from the stoichiometric equation of the combustion reaction. Finally, the number of moles of carbon dioxide must be converted to volume using the ideal gas law.