Marshmallows in vacuum chamber
Summary
TLDRIn this educational demonstration, a vacuum chamber is used to illustrate the principles of Boyle's Law. Two marshmallows, which are colloids, are placed inside the chamber. As the air is drawn out, reducing the pressure, the air trapped inside the marshmallows causes them to expand significantly. The experiment shows that a large portion of a marshmallow's volume is due to the air within it. When the pressure is restored, the marshmallows shrink, demonstrating the relationship between pressure and volume in gases.
Takeaways
- 🍭 The demonstration involves using a vacuum chamber with marshmallows, which are colloids made of sugary polymers and air.
- 🌀 A vacuum pump is connected to the chamber to remove air and lower the pressure inside, affecting the air trapped within the marshmallows.
- 🎈 As the pressure inside the chamber drops, the air inside the marshmallows expands, causing them to increase in size significantly.
- 💥 Some marshmallows popped slightly, possibly due to the rapid change in pressure as air was drawn out.
- 🔄 After the expansion, the presenter re-introduced air to the vacuum chamber to observe the reverse effect on the marshmallows.
- 📉 The marshmallows decreased in volume as air was added back into the chamber, showing the relationship between pressure and volume.
- 🔍 The experiment demonstrates Boyle's Law, which states that the volume of an ideal gas will expand or decrease inversely with pressure, assuming temperature and the number of moles remain constant.
- 📏 A comparison was made to show the original size of the marshmallows, highlighting the significant volume contribution of air within the polymer.
- 🕳️ The marshmallows ended up smaller than their original size after the air was removed, illustrating the effect of pressure on their volume.
- 🧪 The demonstration serves as a practical example of the behavior of gases and the properties of colloids under varying pressure conditions.
- 👨🔬 The presenter concludes that the air inside the marshmallows was responsible for almost twice or more of their original volume, emphasizing the impact of air pressure.
Q & A
What is the purpose of the vacuum chamber in the demonstration?
-The vacuum chamber is used to create a low-pressure environment to observe the effect of reduced pressure on the volume of marshmallows, which are colloids containing air pockets.
What are marshmallows made of, according to the script?
-Marshmallows are made of a sugary polymer that is air-puffed to create a soft, edible texture.
How does the vacuum pump affect the air inside the vacuum chamber?
-The vacuum pump draws the air out of the vacuum chamber, lowering the pressure by removing gas molecules from the container.
What happens to the air trapped inside the marshmallows when the pressure drops?
-The air trapped inside the marshmallows expands as the pressure drops, causing the marshmallows to increase in volume.
Why did the marshmallows pop during the demonstration?
-The marshmallows popped because the air inside them expanded rapidly due to the reduced pressure, and the structure of the marshmallow could not contain the increased volume.
What happens when air is reintroduced into the vacuum chamber after the marshmallows have expanded?
-When air is reintroduced, the pressure inside the chamber increases, causing the volume of the marshmallows to decrease as the air is compressed back into its original state.
What principle from physics is demonstrated in the experiment?
-The experiment demonstrates Boyle's Law, which states that the volume of a gas is inversely proportional to the pressure when temperature and the number of moles are held constant.
How much of the marshmallow's volume is attributed to air, according to the demonstration?
-The demonstration suggests that almost twice the volume of a regular marshmallow is due to the air trapped inside the sugary polymer.
What did the demonstrator do to show the comparison of the marshmallows before and after the experiment?
-The demonstrator placed the original and the vacuum-treated marshmallows side by side to visually compare their sizes and show the effect of air removal on the marshmallow's volume.
What did the demonstrator conclude about the marshmallows after the air was drawn out?
-The demonstrator concluded that the marshmallows were significantly smaller than their original size after the air was drawn out, indicating the substantial volume contribution of air to their size.
What is the significance of keeping the temperature and number of moles constant during the experiment?
-Keeping the temperature and number of moles constant allows for a controlled demonstration of the relationship between pressure and volume, as per Boyle's Law, without the variables of temperature and moles affecting the outcome.
Outlines
🌀 Marshmallow Expansion in a Vacuum Chamber
This paragraph demonstrates the effect of reduced air pressure on marshmallows, which are colloids made of sugary polymers and air. The experiment involves placing two marshmallows in a vacuum chamber connected to a pump that removes air, thereby lowering the pressure. As the pressure inside the chamber decreases, the air trapped within the marshmallows expands, causing them to grow in size. The marshmallows initially pop slightly due to the air being drawn out, but when air is reintroduced, they shrink back to a smaller size than their original, illustrating Boyle's Law, which states that the volume of an ideal gas increases as the pressure decreases, assuming constant temperature and number of moles. The marshmallows' size reduction after air is drawn out shows the significant volume contribution of air within the polymer structure.
Mindmap
Keywords
💡Vacuum Chamber
💡Marshmallows
💡Colloids
💡Pressure
💡Boyle's Law
💡Volume
💡Air Puffing
💡Vacuum Pump
💡Gas Molecules
💡Expansion
💡Ideal Gas
Highlights
Demonstration of using a vacuum chamber to explore the properties of marshmallows.
Marshmallows are described as colloids made of air puffed into a sugary polymer.
The vacuum pump is used to draw air out of the chamber, lowering the pressure.
As pressure inside the chamber drops, the air trapped inside the marshmallows expands.
Observation of marshmallows popping due to the air being pulled out.
The marshmallows' size increases significantly due to the reduced air pressure.
The process of re-introducing air back into the chamber to observe the effect on marshmallows.
Marshmallows decrease in volume as air is reintroduced, showing the impact of air pressure on their size.
Comparison of the marshmallows' size before and after the experiment.
Boyle's Law is introduced to explain the relationship between pressure and volume.
The marshmallows' volume is shown to be more than twice due to the air inside.
The popping of marshmallows as a result of the air being pulled out and the subsequent shrinkage.
Visual demonstration of the marshmallows' original size compared to their deflated state.
The experiment concludes with a clear example of Boyle's Law in action with marshmallows.
The practical application of Boyle's Law in understanding the composition and behavior of marshmallows.
The innovative use of a common food item to demonstrate a fundamental principle of physics.
Transcripts
in this demonstration I'm using a vacuum
chamber this vacuum chamber I have
placed two
marshmallows inside now marshmallows are
colloids they're air puffed into some
kind of sugary polymer that we love to
eat and this hose is connected to a
vacuum pump that draws the air out and
lowers the pressure by taking molecules
of gas out of this
container okay the pressure inside drops
and the air trapped inside our sad and
happy and frightened uh marshmallow Okay
is should
expand as the pressure drops on the
angry okay and scared marshmallow Okay
the air inside should expand out so
let's do
that
[Music]
[Applause]
whoa something interesting
happened they expanded tremendously the
air inside them expanded and pushed the
solid outward but if you notice there
was a they popped a little bit they
popped a little a little
bit because possibly the air was pulled
out of the marshmallow so they're this
size right now because of very little
air pressure so if I was to put the air
back in because the air was drawn out
let's see what
happens all right so I'm going to take
the air out unhook this hose here and we
should see the actual size so low we
increased decreased the pressure the
volume got bigger keeping temperature
and number of molecules constant in the
marshmallow we
lower or increase the pressure by air
air coming back
in whoa that was a flip I like that one
these guys decreased in volume because
the air was left there was no air left
so whatever air that was left I guess
there was some okay their volume
decreased and now what you have is
marshmallows that are certainly smaller
than the original size because the air
has been drawn out of them and to give
you a little comparison of what they
were
before okay let's put these here and
this was exactly the same size so it
gives you an idea in a regular full-size
marshmallow how much air was responsible
for the volume so it looks like to me
almost twice the volume if not more was
due to just air inside this
polymer and all we did was lower the
pressure you saw the polymer expand okay
boils law states as the pressure
decreases the volume of a ideal gas will
expand as long as temperature okay and
number of moles stays constant and you
can clearly see that more than twice the
volume of your marshmallow is just due
to air now the air if you notice popped
because the air left and once it popped
they shrunk okay great example of Bizzle
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