Hydrogen bonding and vapor pressure lesson

Hydrogen bonding and vapor pressure

Hydrogen bonding is a type of bonding that occurs between molecules that are polar​.

Intermolecular Forces

We use Table S to find the differences in electronegativity between two atoms in a bond.

Non-polar covalent molecules have a difference of zero

above zero - 1.7 is polar covalent
Higher than 1.7 is ionic

Electronegativity

Multiple Choice

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• nonpolar covalent

• ionic

• polar covalent

• metallic

Hydrogen = 2.2
Chlorine = 3.2
between 0 than 1.7 is polar covalent

Electronegativity

Multiple Choice

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• nonpolar covalent

• ionic

• polar covalent

• metallic

Chlorine = 3.2
Chlorine = 3.2
0 is nonpolar covalent

Electronegativity

Multiple Choice

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• nonpolar covalent

• ionic

• polar covalent

• metallic

Sodium = 0.9
Chlorine = 3.2
2. 3 is ionic

Electronegativity

Carbon dioxide, CO₂
and Carbon tetra chloride , CCl<sub>4

THEIR SHAPE MAKES THEM NONPOLAR

The charges cancel each other</sub>

TWO EXCEPTION ON THE REGENTS EXAM

Hydrogen bonding cause molecules to stick together like glue.
Everyday example include insects that are light being able to stand on water

Hydrogen bonding

Other examples include iwater in a ballon holds its shape after the ballon pops

Hydrogen bonding

Table H shows the vapor pressure of 4 liquids and how their vapor pressure is affected by temperature.

The higher the curve, the higher the vapor pressure.

Table H
Vapor Pressure of 4 liquids

What is vapor pressure?

Above every liquid is the vapor of that liquid. That vaper pushes down on the liquid

Table H shows the vapor pressure of 4 liquids

Table H
Vapor Pressure of 4 liquids

Propanone ha the highest vapor pressure and ethanoic acid has the lowest vapor pressure

Table H
Vapor Pressure of 4 liquids

The dotted line shows the pressure of the atmosphere.
Where the vapor pressure meets the atmospheric pressure is the temperature where a liquid boils or THE BOILING POINT

Table H
Vapor Pressure of 4 liquids

Temperature and Vapor Pressure

Boiling Point and Vapor Pressure

Intermolecular forces and Vapor Pressure