The hydrocarbons that are liquids at room temperature given in the table are to be determined. The trends in the melting and boiling points of the given hydrocarbons are to be described and the regular trend is to be identified. The types of intermolecular forces present in the given hydrocarbons are to be identified and the boiling point trend is to be explained on the basis intermolecular forces. The graph between boiling point and molar mass of hydrocarbons is to be drawn. From the graph drawn, the boiling point of heptane is to be predicted. Concept Introduction: The lower mass hydrocarbons have low boiling point and usually, they evaporate at room temperature. The hydrocarbon with higher molar mass exists as a liquid at room temperature. The boiling point of hydrocarbon increases with increase of molar mass. The dispersion force exists between the hydrocarbons. Greater the dispersion forces, higher will be the boiling point.

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Chapter 12, Problem 113DIA

Interpretation Introduction

Interpretation: The hydrocarbons that are liquids at room temperature given in the table are to be determined. The trends in the melting and boiling points of the given hydrocarbons are to be described and the regular trend is to be identified. The types of intermolecular forces present in the given hydrocarbons are to be identified and the boiling point trend is to be explained on the basis intermolecular forces. The graph between boiling point and molar mass of hydrocarbons is to be drawn. From the graph drawn, the boiling point of heptane is to be predicted.

Concept Introduction: The lower mass hydrocarbons have low boiling point and usually, they evaporate at room temperature.

The hydrocarbon with higher molar mass exists as a liquid at room temperature.

The boiling point of hydrocarbon increases with increase of molar mass.

The dispersion force exists between the hydrocarbons.

Greater the dispersion forces, higher will be the boiling point.

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