is the total kinetic
(moving) energy of all
on the mass and
energy of the particles!
3. If you have a cup of water the
same temperature as the
ocean, which has more heat
4. How does heat flow?
Heat flows from hot to
cold until the heat is
balanced which we call
5. A metal cup containing water
at 100F is placed in an
aquarium containing water at
A) Which way will heat flow? Why?
B) When will the flow of heat stop?
C) What is it called when heat no
6. How is heat measured?
It is measured in calories, joules, or BTUs
A calorie is the amount of heat used to raise the
temperature of one gram of water one degree
One calorie = 4 joules
One Calorie (food)=1000 calories (4,000 J)
7. What is the difference between
heat and temperature?
is the total amount of kinetic energy
Temperature is a relative measure of the
speed of the particles.
Temperature is measured in degrees.
Temperature and heat are not the
8. What happens when a
substance is heated?
The speed of the
which causes the space
between the particles to
9. How does heat affect volume?
increases with more
heat. More heat means that
the molecules are moving
faster (more kinetic energy),
therefore they bump into one
another and spread out.
Less heat means less volume!
10. What effect does heat have on
When a substance is
heated, it expands,
therefore it becomes
12. Kelvin Scale
A third temperature scale used
mainly for scientific purposes,
where absolute 0 is the coldest
It starts at 0 (which is absolute 0)
13. Absolute Zero
Absolute zero is the
temperature where there is an
absence of heat. There is no
motion of molecules. It has
not been reached in real life
or in a lab, but scientists have
gotten very close.
15. What is speciﬁc heat?
amount of energy needed to raise
the temperature of 1 kg of a substance
by 1 degree Celsius.
The ability of a substance to absorb
This property can help identify
16. Example of Speciﬁc Heat
much energy does it take to raise
the temperature of 2 kilograms of
water by 3°C (speciﬁc heat of water is
Solution: 2 kilograms x 3°C = 6 kg°C
4,184 J/ kg°C x 6 kg°C = 25,104 J
17. What are the 3 states of matter?
Solid-has a defined volume and
Liquid-defined volume, takes the
shape of its container.
Gas-no defined shape or volume.
19. What is heat of fusion?
The amount of energy
used to melt one gram
of a substance without
20. What is heat of vaporization?
The phase change when a liquid becomes a
The energy needed for one gram of a
liquid to become a gas without changing
The particles gain enough energy to permit
them to escape the surface of the liquid and
become a gas.
21. STOP HERE
TAKE THIS QUIZ. SCORES
WILL BE COUNTED. LOOK
BACK THROUGH THE
POWERPOINT AS NEEDED!
Conduction is the direct transfer of heat.
Does conduction happen better in solids,
liquids, or gases?