slideshare about kinetic molecular theory....it was a reporrt in my pysical science subject.

1. KINETIC MOLECULAR
THEORY

2. Democritus
“matter was
empty space
filled with
tremendous
numbers of
tiny particles
called ATOMS”
5th century BC
Aristotle
did not
support
Democritus’
theory on
molecules.
1600’S
Some scientist
support the
theory and
some
evidences on
small particles
and the space
around them
sprouted.
1700’s

3. ATOMS
One of the smallest parts that any substance can be
divided into,that combines with other atoms that make
a MOLECULE.

4. Pure substances
Elements
 A simple chemical
substance compose of
single atom
 E.g. hydrogen(H)
oxygen (O)
carbon (C)
Compound
 Something that consist
of a combination of
two or more atoms
 E.g. Water (H₂O) a
combination of
hydrogen and oxygen

5. molecules
 The smallest unit into which any substance
can be divided without losing its own
chemical nature.
 E.g. Gold*
*even if a gold is broken into two, they are still golds.

6. Molecules Interact
Cohesion
 Attractive force between
same kind of molecules.
Adhesion
 The ability where one
kind of molecule attracts
and clings to a different
kind of molecule.

7. PHASES
OF
MATTER solid
liquid
gas

8. Solid
Have definite shape and
volumes.
Molecules have fixed distances
apart and bound by strong
cohesive forces.

9. Liquids
Molecules of a liquid
are close together and
bound by a cohesive
force that are not as
strong as in a solid.

10. Gases
Composed of
molecules with weak
cohesive forces, no
fixed shapes and no
fixed volume.

11. SOLID LIQUID GAS
SHAPE fixed variable variable
VOLUME fixed fixed variable

12. Vapor-
used to describe a gas that is in a
liquid state.
e.g. Evaporated water from the sea

13. Plasma*-
Occur at extremely high
temperature and are made up of
charged part of atoms.
*rare phase of matter

14.  At higher temperature, the molecules of a
substance move faster with increased agitation
and then they move a little faster apart thus
expanding the substance. As the substance cools
down, the motion slows and the molecular forces
are able to pull the molecules closer together.

15.  Temperature of a gas is proportional to the
average kinetic energy of the gas molecule.(e.g.
ammonia molecules have greater average velocity
at a higher temperature and a slower average
velocity at lower temperature)
 Kinetic energy involves the mass of the molecules
as their velocity:
( KE = ½ mv² )- ( d= gt²/2 )

16. Thank you!!!!!!!!!!!!!!!
Submitted by:
CHRISTINE P.ORIA
Bachelor of Science in Home Technology Education