A PowerPoint Presentation about the first and second Law of Thermodyanamics

1. First Law
and
of
Physi
cs
Teachin
g
Demo
Presented by:
Melchor J.

2. First Law
and
of
Physi
cs
Teachin
g
Demo
Presented by:
Melchor J.

3. Review
• Thermodynamics
- can be defined as the science
of energy.
• Energy - can be viewed as
the ability to cause changes.

4. Review
Law of Conservation of Energy
- states that during an interaction,
energy can change from one
form to another but the total
amount of energy remains
constant.

5. First Law of Thermodynamics

6. First Law of Thermodynamics
• The First Law states that
energy cannot be created
nor destroyed; rather, the
amount of energy lost in a
steady state process cannot
be greater than the amount
of energy gained.

7. First Law of Thermodynamics
Example
Figure 1. Conservation of Energy for the Human Body

8. First Law of Thermodynamics
• The change in internal energy
of the system during any
thermodynamic process
depends only on the initial
and final states, not on the
path leading from one to the
other.

9. Second Law of Thermodynamics
“Heat can spontaneously flow
from a higher-temperature
region to a lower-
temperature region, but not
the other way around."

10. Second Law of Thermodynamics
Where:
ΔS - change in entropy
ΔQ – change in heat
T - Period

11. Example
Figure 2. Heat flows in the direction of decreasing temperature.

12. Thank You!!!