Transcript 10/3 STATES OF MATTER ppt

STATES OF MATTER
LIQUID
 Particles of liquids are
tightly packed, but are
far enough apart to
slide over one
another.
 Liquids have an
indefinite shape and a
definite volume.
Heat
STATES OF MATTER
GAS
 Particles of gases
are very far apart
and move freely.
 Gases have an
indefinite shape
and an indefinite
volume.
Heat
PHASE CHANGES
Description of
Phase Change
Solid to
liquid
Term for Phase
Change
Melting
Liquid to
Freezing
solid
Heat Movement During
Phase Change
Heat goes into
the solid as it
melts.
Heat leaves the
liquid as it
freezes.
PHASE CHANGES
Description of
Phase Change
Term for Phase
Change
Heat Movement During
Phase Change
Vaporization,
Liquid to
which includes Heat goes into the
gas
boiling and
liquid as it vaporizes.
evaporation
Heat leaves the gas
Gas to liquid Condensation
as it condenses.
Heat goes into the
Solid to gas Sublimation
solid as it sublimates.
Two states of matter they didn’t teach you
about in school…
Until Now!
But what happens if you raise the
temperature to super-high levels…
between
1000°C and 1,000,000,000°C ?
Will everything
just be a gas?
NO!
If the gas is made up of particles which carry an
electric charge (“ionized particles”), but the
entire gas as a whole has no electric charge,
and if the density is not too high, then we
can get
The 4th state of matter:
PLASMA
STATES OF MATTER
PLASMA
 A plasma is an
ionized gas.
 A plasma is a very
good conductor of
electricity and is
affected by
magnetic fields.
 Plasmas, like gases • Plasma is the
have an indefinite
common state
shape and an
of matter
indefinite volume.
STATES OF MATTER
Bose
Eienstein
Condensate
Motionless
SHAPE like
1 big atom
DEFINITE
Volume
SOLID
Tightly packed, in
a regular pattern
Vibrate, but do not
move from place
to place
Definite shape
Definite volume
LIQUID
Close together
with no regular
arrangement.
slide past each
other
Indefinite Shape
Definite Volume
GAS
Well separated
no regular
arrangement.
move freely at
high speeds
Indefinite Shape
Indefinite Volume
PLASMA
composed of
electrical charged
particles
Indefinite Shape
Indefinite Volume
Some places where plasmas are found…
1. FLAMES
BUT IT IS
NOT
FIRE.
2. Lightning
3. Aurora (Northern Lights)
The Sun is an example of a star in its
plasma state
5. Stars
Stars make up 99% of the total matter in the Universe.
Therefore, 99% of everything that exists in the entire
Universe is in the plasma state.
4. Neon lights
6. Clouds of gas and dust around stars
6
So now we know all about
five states of matter:
BEC
SOLIDS
Bose
Einstein
Condensate
Lower
Temperature
LIQUIDS
GASES
PLASMAS
(only for low density
ionized gases)
Higher
Temperature
But now what happens if you lower the
temperature way, way, down to
100 nano degrees above
“Absolute Zero” (-273°C)
Will everything
just be a frozen
solid?
Not Necessarily!
In 1924 (82 years ago), two scientists, Albert
Einstein and Satyendra Bose predicted a 5th
state of matter which would occur at very
very low temperatures.
Einstein
Bose
+
Finally, in 1995 , Wolfgang
Ketterle and his team of
graduate students (like me)
discovered the 5th state of
matter for the first time.
Ketterle and his
students
The 5th state of matter:
Bose-Einstein Condensate
In a Bose-Einstein condensate, atoms can no
longer bounce around as individuals.
Instead they must all act in exactly the same
way, and you can no longer tell them apart!
Here is a picture a computer took of
Bose-Einstein Condensation
The big peak happens
when all the atoms
act exactly the same
way!
(We can’t see
Bose-Einstein
condensation
with our eyes
because the
atoms are too
small)
Some other computer images of Bose-Einstein Condensates…
To really understand
Bose-Einstein
condensate you need to
know
Quantum Physics
In 2002, Ketterle and two other scientists
received the highest award in science for
discovering Bose-Einstein condensate:
The Nobel Prize
The five states of matter:
BOSEEINSTEIN
SOLIDS
CONDENSATE
LOW ENERGY
Lower
Temperature
PLASMAS
LIQUIDS
GASES
(only for low
density ionized
gases)
HIGH ENERGY
Higher
Temperature