Q1 Intermolecular

Question 1

evidence for moving particles

Answer 1

Brownian motion

Question 2

Viewed through a microscope,
smoke can be seen to be made up
of millions of tiny bits or
particles. The bits of smoke
glint in the light from the lamp.

Answer 2

Brownian Motion

Question 3

Viewed through a microscope,
smoke can be seen to be made up
of _______or
______. The bits of smoke
glint in the light from the lamp.

Answer 3

million of tiny bits or particles

Question 4

As they drift through the air
they are seen to wobble in _________. This was first
noticed in _____ by ____. The effect is called
Brownian motion.

Answer 4

zigzag paths,
1827
Robert brown

Question 5

can explain
Brownian motion – the bits of
smoke, just large enough to be
seen, have so little mass that
they are ‘jostled’ about by
thousands of surrounding gas
particles that bump into them at
random.

Answer 5

Kinetic Theory

Question 6

Particles in solids, liquids
and gases have kinetic
energy (movement) and
stored potential energy.
_____ have the most PE.

Answer 6

Gases

Question 7

The total KE and PE of all
atoms and molecules in a
material is called the _______. The
hotter a material, the
faster the particles move,
and the more internal
energy it has.

Answer 7

Internal Energy

Question 8

The term ______ is
often used for both internal
energy and heat

Answer 8

Thermal Energy

Question 9

states that submicroscopic particles of all
matter are in constant motion

Answer 9

Kinetic Theory

Question 10

is the energy of moving
objects

Answer 10

Kinetic Energy

Question 11

gas particle can change direction only when
it strikes the wall of its container or another
gas particle

Answer 11

Kinetic Model of Gases

Question 12

Collisions of particles in a gas are called ______because no kinetic energy is loss

Answer 12

elastic collision

Question 13

Particles of a liquid can slide past each
other, but they are so close together that
they don’t move as straight as gas
particles

Answer 13

Kinetic Model of liquid

Question 14

Strong forces between particles explain the rigid structure
of solids

Particles of a solid cannot move past each other, but they
are in constant motion (vibration)

Particles occupy fixed positions in a well defined, 3-
dimensional arrangement

Answer 14

Kinetic Model of Solids

Question 15

The arrangement, which is repeated
throughout the solid

Answer 15

Crystal lattice

Question 16

• Called “Van der Waals Forces”
• They arise from weak “electrostatic attractions”
  between molecules.
• nagcoconnect sa molecules

Answer 16

Intermolecular forces of attraction

Question 17

• Occurs between polar molecules
• Polar Molecule = “Permanent Dipole”
• asymmetrical molecule with polar bonds
• has lone pair

Answer 17

Dipole-Dipole attraction

Question 18

Strong InterMF

Answer 18

Polar ( Dipole-Dipole )

Question 19

• Super strong Dipole-Dipole Attraction
• Occurs when molecules have hydrogen atoms
  bonded to very small, highly electronegative
  atoms like F, O or N
• Creates a very polar bond and an “extra polar”
  molecule.

Answer 19

Hydrogen Bonding

Question 20

Hydrogen Bonding is responsible for:

Answer 20

surface tension
how it beads

Question 21

-weak force Only attractive forces between nonpolar
molecules and noble gas atoms.
-Weakest of all intermolecular forces.

Answer 21

Dispersion force

Question 22

Dispersion force is also called as

Answer 22

induced dipole

Question 23

How can you increase the chance for
Dispersion forces to be felt between NONPOLARS?

Answer 23

high pressure/low temp condition
(nakasisira ng IMF and high temperature, nabubuwag niya)

Question 24

• Attraction between polar solvent molecules
  and ions in an ionic crystal.
• Allows polar solvent (like water) to “pull” the
  ions into solution, creating “hydrated” ions.

Answer 24

molecule ion attraction

Question 25

are generally soluble in polar solvents like water

Answer 25

Ionic compounds