At 303 K ethanol has a vapour pressure of about 0.118 atm., acetic acid has the vapour pressure of about 0.039 atm., and ethyl iodide has a vapour pressure of about 0.263 atm. Which of the following represents the correct order of increasing normal boiling point ?

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At 303 K ethanol has a vapour pressure of about 0.118 atm., acetic acid has the vapour pressure of about 0.039 atm., and ethyl iodide has a vapour pressure of about 0.263 atm. Which of the following represents the correct order of increasing normal boiling point ?

A. $C H_{3} C O O H < C_{2} H_{5} O H < C_{2} H_{5} I$

B. $C_{2} H_{5} I < C H_{3} C O O H < C_{2} H_{5} O H$

C. $C_{2} H_{5} I < C_{2} H_{5} O H < C H_{3} C O O H$

D. $C_{2} H_{5} O H < C_{2} H_{5} I < C H_{3} C O O H$

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Accepted Answer

C.

C_{2} H_{5} I < C_{2} H_{5} O H < C H_{3} C O O H

At 303 K ethanol has a vapour pressure of about 0.118 atm., acetic acid has the vapour pressure of about 0.039 atm., and ethyl iodide has a vapour pressure of about 0.263 atm. Which of the following represents the correct order of increasing normal boiling point ?

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