The compounds ethanol and dimethyl ether have the following Lewis structures: st

Question

The compounds ethanol and dimethyl ether have the following Lewis structures: structural formulas. Which term describes the relationship between these compounds? (a) They are isotopes of one another, are isomers of one another. (c) They are isobars of one another. (d) They are isobars tones of one another. (3) Look back to Question. One compound has a normal boiling point of 78 degree C, and the other has a normal boiling point of - 25 degree C. Which compound has the higher boiling point, and why? (In considering the choices below, remember that a Lewis structure can be valid without necessarily depicting bond angles accurately.) (a) Dimethyl ether has the higher boiling point, because it has greater dispersion forces. (b) Ethanol has the higher boiling point, because it has greater dispersion forces. (c) Dimethyl ether has the higher boiling point, because it can hydrogen-bond with molecules of its own kind, whereas ethanol cannot. (d) Ethanol has the higher boiling point, because it can hydrogen-bond with molecules of its own kind, whereas dimethyt ether cannot. (e) Ethanol has the higher boiling point, because it has the dipole-dipole force, but dimethyl ether lacks the dipole-dipole force. (4) Which statement is true about the two compounds SO_2 and SO_3 ?

Explanation / Answer

3)
ethanol has hydrogen attached to highly electronegative element oxygen and hence they can form hydrogen bonding
On the other hand dimethyl ether have just dipolar interaction

Answer: d

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