Do you want a simple but fun science experiment? It’s about putting Ivory soap in the microwave. And after a minute you can have something amazing that doesn’t look like solid soap.
During the course of this experiment, the Charles Act, also known as the Gay-Lussac Act, was applied. It is found that the volume occupied by a given quantity of gas is completely identical to its absolute temperature when it is under constant pressure.
However, airborne ivory soap was added throughout the manufacturing process. That’s why we see this floating in the eau.
And when the cells are heated in the microwave, the air particles are released and expand. The result: The soap swells in the microwave.