Respuesta :
Answer: Given compounds are arranged in decreasing order of their vapor pressure as follows.
[tex]Br_{2}[/tex] > [tex]NCl_{3}[/tex] > [tex]H_{2}O[/tex]
Explanation:
Vapor pressure is defined as the pressure exerted by the vapors which are present on the surface of a liquid. Less is the intermoecular forces present within the molecules of a substance more will be its vapor pressure.
For example, [tex]Br_{2}[/tex] is a gas and there exists Vander waal forces between its molecules. Hence, it has more vapor pressure than [tex]NCl_{3}[/tex] and [tex]H_{2}O[/tex].
In [tex]H_{2}O[/tex], there exists hydrogen bonding which is stronger than bonding present in [tex]NCl_{3}[/tex]. So, [tex]H_{2}O[/tex] has low vapor pressure.
In [tex]NCl_{3}[/tex], there exists dipole-dipole interaction which is stronger than Vander waal forces but weaker than hydrogen bonding.
Therefore, given compounds are arranged in decreasing order of their vapor pressure as follows.
[tex]Br_{2}[/tex] > [tex]NCl_{3}[/tex] > [tex]H_{2}O[/tex]
Vapor pressure is defined as the force exerted by the vapors of a substance on the walls of a container in a closed system. The higher the number of intermolecular forces, the lower will be its vapor pressure.
The compounds arranged in the decreasing order of their vapor pressure are:
Br₂ [tex]>[/tex] H₂O [tex]>[/tex] NCl₃
The vapor pressure of the compounds can be explained as:
- Bromine is a gaseous compound, which has the Van der Waal force of attraction between its molecules. It is the weakest intermolecular force of attraction, therefore, the vapor pressure will be higher than NCl₃ and water.
- Also, in water molecules, the intermolecular force that exists between the molecules is hydrogen bonding. The hydrogen bonding is stronger than van der Waals but weaker than the dipole-dipole interaction. Thus, it will have vapor pressure higher than Bromine.
- The compound NCl₃ will have the lowest vapor pressure because of the molecule exhibit the dipole-dipole interactions.
Thus, the correct sequence in decreasing order is:
Br₂ [tex]>[/tex] H₂O [tex]>[/tex] NCl₃
To know more about vapor pressure, refer to the following link:
https://brainly.com/question/17757365
