The document uses the analogy of a hamster eating and regurgitating food to explain the concept of enthalpy. Enthalpy refers to the exchange of heat energy during chemical reactions. Endothermic reactions absorb heat from the surroundings through consuming "food" or heat, while exothermic reactions release heat through "regurgitating" it. The constant cycling between absorbing and releasing heat allows systems like atoms and molecules to maintain equilibrium, similar to how a hamster maintains its internal balance through eating and eliminating food. If an exothermic reaction releases heat faster than it can absorb new heat, the pressure builds like a hamster feeling increasingly full, until it violently expels the excess.

1. T H E A R T O F C O N S U M P T I O N & E X P U L S I O N
ENTHALPY
Abdur-Raheem As-Siddiq
Understanding Enthalpy

2. HERE IS ENTHALPY EXPLAINED
CONFUSED YET?

3. HERE IS ENTHALPY EXPLAINED
 Do you know what is happening in this video?
 What is Happening Here?

4. LET’S MAKE IT SIMPLE
In order to understand enthalpy as it occurs, we can
identify the original matter as a hamster that wants
to live.
In order for the hamster to live, it must maintain a
constant balanced diet (food).

5. ENTHALPY: EATING TO LIVE
The hamster desires food, but if it eats too much, it will
regurgitate the excess in order to maintain the balanced diet. If it
regurgitates too much, it has to take more food in. So the cycle of
maintaining its existence is continuous as long as food is being
introduced.

6. ENTHALPY: EATING TO LIVE
If food is being regurgitated faster than retrieved, it will extend its
reach (work harder) to pull more food in so that the hamster can
maintain its balance.
If the hamster is constantly bombarded or surrounded by food, its
regurgitation will become increasingly more violent or build-up
for a forceful and extreme expelling of food. Keep this analogy in
mind as we discuss enthalpy.

7. EATING TO LIVE vs. ENTHALPY
 Hamster=Original state of the atom (molecules or
fuel burning)
 Food=Heat
 Feeling to Regurgitate=Pressure
 Consuming Food=endothermic reaction or
absorbing heat (positive enthalpy)
 Regurgitating Food=exothermic reaction or expelling
heat (negative enthalpy)

8. SCIENCE OF IT ALL
 The system wants to remain at its starting pressure
(Friedman, Gann, 6).
 Depending on the stability of the atoms that form the
molecule(s), the chemical compounds expend energy as
they seek new relationships.
 During the exchange process of gaining and losing
electrons, energy must be released and absorbed in order to
maintain the starting pressure of the participating
molecules.

9. SCIENCE OF IT ALL
When energy is released, it is called an exothermic reaction
and is presented as a negative energy flow because it is losing
energy. An endothermic reaction is presented as a positive
energy flow because it is gaining energy. This process of the
exothermic versus endothermic transfer of energy is called
enthalpy. POSITIVE NEGATIVE

10. SCIENCE OF IT ALL
 In the video, the smoke appears to
bellow more smoke every few
seconds. What this is telling us is
that the “hamster” has more food
within the structure than it can
consume. Therefore, it is
continuously taking in food and
regurgitating more!
 In other words, there is a
tremendous amount of food (heat)
inside the structure and the
exothermic reaction is becoming
increasingly dangerous!

11. Conclusion
 If the hamster continues to consume the tremendous
amount of food, it will regurgitate a tremendous
amount of food at its first opportunity.
 We have to find a way to take the food away evenly
so that the feeling to regurgitate is consequently
diminished
 That is to say that we must properly ventilate