arrange the following liquids in increasing order of their vapor pressures. do t

ID: 986093 • Letter: A

Question

arrange the following liquids in increasing order of their vapor pressures. do this by identifying the boiling points for each of the liquids, and then use the relationship between boiling point and vapor pressure to answer the question.

5. (3pj Arrange the following liquids in incressing order of their vapor pressures. Do this by dentèying the boling points for each of the liquids, and then uae the reationship between boišng point& vapor pressune to answer the queston. (x pts) Diedhiyl ether, methylene chioride (dickorometrane), ethanol, n-pentane, benzere. chioroform 3pt Draw the Lewls-dash structures for 1,2-dichloroethane and acetic acid. Indicahe the boling point for each of these two pure compounds. Ifyou are given a miature of these

Explanation / Answer

The boiling point is the temperature at which the vapor pressure of the liquid equals the pressure at enviornment of liquid and the liquid changes to vapor. A liquid in a vacuum has a lower boiling point than when that liquid is at atmospheric pressure.

Liquid

Boiling Point

Diethyl ether

34.6 oC

Methylene Chloride

39.6 oC

Ethanol

78.37oC

n- Pentane

36.1 oC

Benzene

80.1oC

Chloroform

61.2oC

As per the above table increasing order of Boiling points of liquids is as follows:

Diethyl ether < n- Pentane < Methylene Chloride < Chloroform < Ethanol < Benzene

As we know the as the boiling point decreases vapor pressure increases. So the increasing order of vapor pressure of the liquids is:

Benzene < Ethanol < Chloroform < Methylene Chloride < n- Pentane < Diethyl ether