Gases always move from areas of which pressure to areas of which pressure?

Gases naturally move from areas of higher pressure to areas of lower pressure due to the principle known as diffusion. This movement occurs because gas molecules spontaneously spread out to achieve an even distribution of particles. In a high-pressure environment, there are more molecules in a given volume, which leads to a tendency for them to move into a lower pressure area where there are fewer molecules. This process continues until the pressures in both areas equalize, aligning with the second law of thermodynamics, which states that systems tend toward increased entropy or disorder. Understanding this fundamental behavior of gases is crucial in fields such as firefighting, where the movement of smoke and heat can significantly impact fire dynamics and safety procedures.