Question

The boiling points for a set of compounds in a homologous series can be qualitatively predicted using intermolecular force strengths. Using their condensed structural formulas, rank the homologous series for a set of alkanes by their boiling point.Rank from highest to lowest boiling point. To rank items as equivalent, overlap them.a)CH3CH2CH2CH3 b) CH3CH2CH2CH2CH2CH3CH3c) CH3CH2CCH2CH3CH3d)CH3CH2CH2CH2CH2CH2CH3answer is D, B , C, A

Answer 1

Heptane (d) > Hexane (b) 3,3 dimethyl pentane (c) > butane (a)

Step-by-step explanation:

The boiling points of the alkanes are depends on the following factors:

• Hydrocarbons with strong intermolecular forces have high boiling points.
• Longer carbon chain molecules have high boiling points.
• Straight chain hydrocarbon molecules have high boiling points than the branched chain hydrocarbons molecules because straight chain molecule have large surface area.

The given molecules are as follows.

a) Butane

b) Hexane

c) 3,3 dimethyl pentane

d) Heptane.

The Highest to lowest boiling point order is as follows.

Heptane (d) > Hexane (b) 3,3 dimethyl pentane (c) > butane (a)