If substance releases into another substance, released substance tends to flow {diffusion}| throughout other substance, until released substance evenly distributes.
cause
Random molecule elastic collisions cause diffusion. Diffusion decreases system order. Gases tend to expand as molecules collide. Expansion rate depends on molecule velocity and size and on barriers to motion.
spectrum
In media, introduced foreign substance diffuses outward over time depending on number {spectral dimension} of medium-particle nearest neighbors. For ink in water, ink volume V increases as time t to 3/2 power: V = t^1.5.
Physical Sciences>Chemistry>Inorganic>Phase
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Date Modified: 2022.0224