In a demonstration of Boyle's law,
we'll place the balloon
in a vacuum bell jar.
We'll apply a vacuum, which basically
pumps out the air in the bell jar.
The pressure outside the balloon
will be greater than the pressure inside.
The balloon expands to try
and equalize the pressure.
Volume and pressure are
inversely related to each other.
When we release the vacuum,
the pressure increases
and the volume decreases.
As another demonstration of Boyle's law,
we will put a marshmallow peep
into our vacuum jar.
The marshmallow contains air
trapped in a mixture of gelatin and sugar.
As we apply the vacuum,
the pressure outside
is lower than the pressure inside
the air in the peep will expand
to try and equalize the pressure.
When we release the vacuum,
the pressure increases,
and the volume decreases.
As another illustration of Boyle's law,
we will put some shaving cream
into our vacuum jar.
The shaving cream contains air
trapped in a soap mixture.
As we apply a vacuum, the pressure outside
is lower than the pressure inside,
the shaving cream will expand to try
and equalize the pressure.
As you decrease the pressure,
the volume increases.