Soap Souffle


What You Need:

Ivory soap is one of the few brands of bar soap that floats in water. Ivory soap floats because it has air pumped into it during the manufacturing process. When you place this soap in the microwave, it actually starts to pop like a marshmallow. The air bubbles in the soap contain water. When the water is heated in the microwave, it vaporises and forms bubbles and the heat causes trapped air to expand. This effect is actually a demonstration of Charles' Law. Charles' Law states that as the temperature of a gas increases, so does its volume. When the soap is heated, the molecules of air in the soap move quickly, causing them to move far away from each other. This causes the soap to puff up and expand to an enormous size. This is the only brand of soap that will form rigid soap suds, while the others simply melt in the microwave.

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