The boiling points of propanol (CH₃CH₂CH₂OH)and pentanol (CH₃CH₂CH₂CH₂CH₂OH)are 97°C and 137°C, respectively.The boiling point of butanol (CH₃CH₂CH₂CH₂OH)is predicted to be: A) 137°C C) 97°C and

Question

The boiling points of propanol (CH₃CH₂CH₂OH)and pentanol (CH₃CH₂CH₂CH₂CH₂OH)are 97°C and 137°C, respectively.The boiling point of butanol (CH₃CH₂CH₂CH₂OH)is predicted to be: A)< 97°C B)> 137°C C)> 97°C and < 137°C D)97°C E)137°C

Quizplus · Accepted Answer

The boiling point of an alcohol increases as its molecular weight increases due to the increase in London dispersion forces between the molecules. Butanol is between propanol and pentanol in molecular weight, so its boiling point should be between their boiling points. Therefore, the best choice is C, as it is predicted to have a boiling point between 97°C and 137°C.

The Boiling Points of Propanol (CH3CH2CH2OH)and Pentanol (CH3CH2CH2CH2CH2OH)are 97°C and 137°C

The Boiling Points of Propanol (CH₃CH₂CH₂OH)and Pentanol (CH₃CH₂CH₂CH₂CH₂OH)are 97°C and 137°C