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Arrange the following substances in order of increasing boiling point: CH 3 OH,

ID: 982815 • Letter: A

Question

Arrange the following substances in order of increasing boiling point: CH3OH, CH4, CH3CH2OH, HOCH2CH2OH

CH3OH < CH4 < CH3CH2OH < HOCH2CH2OH

CH4 <CH3OH < CH3CH2OH < HOCH2CH2OH

CH4 <CH3OH < HOCH2CH2OH < CH3CH2OH

CH3OH < CH4 < HOCH2CH2OH < CH3CH2OH

HOCH2CH2OH < CH3CH2OH < CH3OH < CH4

A)

CH3OH < CH4 < CH3CH2OH < HOCH2CH2OH

B)

CH4 <CH3OH < CH3CH2OH < HOCH2CH2OH

C)

CH4 <CH3OH < HOCH2CH2OH < CH3CH2OH

D)

CH3OH < CH4 < HOCH2CH2OH < CH3CH2OH

E)

HOCH2CH2OH < CH3CH2OH < CH3OH < CH4

Explanation / Answer

boiling point increaes due to:

mass of comopnent

orgnaic group presents (i.e. those that can form hydrogen bonding or polar bonds)

therefore

least BP must be CH4, since it is only dispersion forces

all other are alcohols, least mass is CH3OH

then ethanol

finally

HOCH2CH2OH

therefore choose:

B)

CH4 < CH3OH < CH3CH2OH < HOCH2CH2OH

CH4 < CH3OH < CH3CH2OH < HOCH2CH2OH

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