Why does pop make the hissing sound?

The hissing sound that pop makes is primarily due to the rapid release of carbon dioxide gas when the can or bottle is opened. When the seal is broken, the pressure inside is released, allowing the gas that was dissolved in the liquid to escape quickly. This release creates bubbles that burst at the surface, producing the characteristic hissing sound. Additionally, the sound can vary depending on the amount of carbonation and the type of container.