For each pair of compounds listed, check the box next to the one with the higher boiling point.

Question

[su_box title="♦ Relevant knowledge" box_color="#2d6ff7" radius="1"]With Hydrocarbons The boiling point of the homologous series increases gradually as they go in an increasing direction (Alkanes, Alkenes, Alkines, Aren...) because the molecular mass also increases at that time. Example: C2H6 > CH4 As for isomers, those with higher boiling points have longer chains With derivatives R-X derivative, boiling point will increase as X attracts electrons more strongly if there is no hydrogen bond Example: C4H9 The halogen derivative of the alkene boils and melts at a lower temperature than the derivative of the corresponding alkane. Derivatives of Benzene: Putting a simple substituent on the benzene ring will raise the boiling point. With compounds containing functional groups When two substances have the same homologous series, the one with the larger molecular mass has the higher boiling point For example: CH3OH and C2H5OH, C2H5OH has a higher boiling point For compounds with different functional groups, the boiling points of organic substances are different The boiling points of alcohols, aldehydes, acids, ketones, and esters are respectively in the following order: Acids > Alcohols > Amines > Andehites, Ketones and Esters Ketones > Andehite The electron-absorbing radicals (Phenyl, Chlorine ...) will reduce the boiling point because the H-bond will become less stable For example: Cl-CH2COOH Cl > Br > I

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For each pair of compounds listed, check the box next to the one with the higher boiling point.

Rank these compounds by their expected boiling point. Highest boiling point Lowest boiling point CH3OH CH4…