Lesson 1-3 Flashcards
Force that causes the molecule on the surface of a liquid to be pushed together and form a layer.
Surface Tension
A substance that flows readily has low ______
Viscosity
IMFA means….
Intermolecular Force of Attraction
It explains why a drop of liquid is spherical in shape
Surface Tension
The resistance of fluids to flow
Viscosity
If a liquid has _____________ forces of attraction, the escaping tendency of the molecules
weak intermolecular
The temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure
Boiling point of a liquid
The greater the _____, the higher the viscosity, and the _____ readily the liquid flows
IMFA, less
Is the amount of heat needed to vaporize a given of substance as its boiling point
Polar heat of vaporization
_______ can walk on the surface of the water
Water Strider
The _________ the intermolecular force of attraction, the ________ the surface tension
stronger, greater
This cause a high vapor pressure for a liquid
Vapor pressure of a liquid
Liquids that have high vapor pressure have ______________________.
low boiling point
Why is the escaping tendency of the molecules is low?
-evaporation is slow
-produces a vapor pressure of the liquid
Have a different vapor pressures at different temperatures
Liquid
Amount of ________ in between particles is related to the substance’s state of matter
space
____________ have more kinetic energy since they can freely move
Liquid Particle
A German physicist who later worked in the United States proposed that temporary fluctuations in the electron distributions within atoms and nonpolar molecules could result in the formation of short-lived instantaneous dipole moments.
Fritz London
Present between all molecules, whether they are polar or nonpolar.
LONDON DISPERSION FORCES
-the partial negative side of one molecule is attracted to the partial positive side of another molecule.
-stronger than dispersion forces.
DIPOLE-DIPOLE
FORCES
In ______________ the electrons are unevenly distributed because some elements are more electronegative than others.
polar molecules
A polarized molecule having partially positive and negative poles
Dipole
Dipole-dipole force exist only in polar covalent. True or False
True
is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N‒H, O‒H, or F‒H, and an electronegative O, N, or F atom.
Hydrogen bond
In intramolecular force, “intra” means?
within
In intermolecular force, “inter” means?
between
-attractive force that occurs between an ion and a polar molecule.
-is an atom or group that holds an electrical charge.
ION-
DIPOLE
Types of Intermolecular Forces
-London Dispersion Forces
-Dipole-dipole Forces
-Hydrogen Bond Forces
-Ion-dipole Forces
All of the terminal atoms (or groups) are symmetrically arranged around the central atom
Nonpolar (molecule)
One or more terminal atoms differ from each other.
Polar (molecule)
