Lesson 1-3

Question 1

Force that causes the molecule on the surface of a liquid to be pushed together and form a layer.

Answer 1

Surface Tension

Question 2

A substance that flows readily has low ______

Answer 2

Viscosity

Question 3

IMFA means….

Answer 3

Intermolecular Force of Attraction

Question 4

It explains why a drop of liquid is spherical in shape

Answer 4

Surface Tension

Question 5

The resistance of fluids to flow

Answer 5

Viscosity

Question 6

If a liquid has _____________ forces of attraction, the escaping tendency of the molecules

Answer 6

weak intermolecular

Question 7

The temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure

Answer 7

Boiling point of a liquid

Question 8

The greater the _____, the higher the viscosity, and the _____ readily the liquid flows

Answer 8

IMFA, less

Question 9

Is the amount of heat needed to vaporize a given of substance as its boiling point

Answer 9

Polar heat of vaporization

Question 10

_______ can walk on the surface of the water

Answer 10

Water Strider

Question 11

The _________ the intermolecular force of attraction, the ________ the surface tension

Answer 11

stronger, greater

Question 12

This cause a high vapor pressure for a liquid

Answer 12

Vapor pressure of a liquid

Question 13

Liquids that have high vapor pressure have ______________________.

Answer 13

low boiling point

Question 14

Why is the escaping tendency of the molecules is low?

Answer 14

-evaporation is slow
-produces a vapor pressure of the liquid

Question 15

Have a different vapor pressures at different temperatures

Answer 15

Liquid

Question 16

Amount of ________ in between particles is related to the substance’s state of matter

Answer 16

space

Question 17

____________ have more kinetic energy since they can freely move

Answer 17

Liquid Particle

Question 18

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.

Answer 18

Fritz London

Question 19

Present between all molecules, whether they are polar or nonpolar.

Answer 19

LONDON DISPERSION FORCES

Question 20

-the partial negative side of one molecule is attracted to the partial positive side of another molecule.
-stronger than dispersion forces.

Answer 20

DIPOLE-DIPOLE
FORCES

Question 21

In ______________ the electrons are unevenly distributed because some elements are more electronegative than others.

Answer 21

polar molecules

Question 22

A polarized molecule having partially positive and negative poles

Answer 22

Dipole

Question 23

Dipole-dipole force exist only in polar covalent. True or False

Answer 23

True

Question 24

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.

Answer 24

Hydrogen bond

Question 25

In intramolecular force, “intra” means?

Answer 25

within

Question 26

In intermolecular force, “inter” means?

Answer 26

between

Question 27

-attractive force that occurs between an ion and a polar molecule.
-is an atom or group that holds an electrical charge.

Answer 27

ION-
DIPOLE

Question 28

Types of Intermolecular Forces

Answer 28

-London Dispersion Forces
-Dipole-dipole Forces
-Hydrogen Bond Forces
-Ion-dipole Forces

Question 29

All of the terminal atoms (or groups) are symmetrically arranged around the central atom

Answer 29

Nonpolar (molecule)

Question 30

One or more terminal atoms differ from each other.

Answer 30

Polar (molecule)