Problem: Place these hydrocarbons in order of decreasing boiling point. Rank from highest to lowest boiling point. Paraffin, C35H72Propane, C3H8 Hexane, C6H142,2-dimethylbutane, C6H14Hexadecane, C16H34

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FREE Expert Solution
  • Remember that as the MOLAR MASS increases, the boiling point also increases for hydrocarbons or alkanes.

  • Surface area also contributes to the increase of boiling point, higher SA, higher BP

  • Another thing is that, as the number of C increases, molar mass also increases

  • In this case, paraffin will appear as having the highest BP while propane will have the lowest BP

  • For hexane and 2,2-dimethylbutane, both has similar molecular formula however, their structure looks different

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Problem Details

Place these hydrocarbons in order of decreasing boiling point. Rank from highest to lowest boiling point. 

Paraffin, C35H72

Propane, C3H

Hexane, C6H14

2,2-dimethylbutane, C6H14

Hexadecane, C16H34

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Based on our data, we think this problem is relevant for Professor McCurdy & Haes' class at IOWA.