Henry's Law states that the amount of a gas that dissolves in a liquid is directly proportional to the pressure of that gas above the liquid. This means that if you increase the pressure of the gas, more of it will dissolve in the liquid. Conversely, if the pressure decreases, the gas will come out of the solution. This principle is commonly observed in carbonated beverages, where carbon dioxide is dissolved in the liquid under high pressure. When you open a soda can, the pressure drops, causing the carbon dioxide to escape, which creates the fizzing sound and bubbles.