Eli5 why a marshmallow expand in vacuum?
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So there is a scientific law called **Boyle’s law** which states ” At a constant temperature, pressure is inversely proportional to the volume of the gas”
So marshmallows have these small molecules or bubbles of air inside them and these molecules are at atmospheric pressure and the moment the air inside the container is sucked out, the volume of the container remains the same although there is much less air inside – so the pressure is reduced.
So the molecules inside the marshmallows are at higher pressure than the surroundings of the marshmallow, so these molecules push outwards which cause it to expand
If I remember rightly it’s the air that’s trapped inside the marshmallow expands due to the lowering pressure
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