Particle size, temperature, concentration difference and diffusion distance affect the rate of diffusion. The particle size highly influences the rate of diffusion. Since the heat of the environment is the energy source for diffusion, a smaller particle at a given temperature moves faster than a larger particle. The rate of diffusion shares an inversely proportional relationship with the particle size.
Temperature and the rate of diffusion have a directly proportional relationship with one another. The rate of diffusion increases as the temperature increases. At higher temperatures, particles move faster because more energy is available to diffuse them.
The rate of diffusion increases as the concentration difference increases. A substance diffusing between two areas exhibits a concentration difference as the particles diffuse from one side of the wall to the other side. For example, if a semipermeable bag of plain water is placed in salt water, the rate of diffusion increases because the salt water has a higher concentration of particles than the plain water.
The rate of diffusion is directly proportional to a particle's distance. It takes longer for a particle to diffuse when it is further away than it does for a particle that is closer to the point of diffusion.Learn More
Diffusion rates are dependent on molecular sizes because larger molecules diffuse slower than smaller molecules. The sizes of the particles involved in the diffusion are important because they closely relate to the concepts of heat and energy in the context of diffusion. It takes more energy and heat to move a larger object than a smaller one, so larger particles require more heat from their surroundings.Full Answer >
The factors that affect the rate of weathering are humidity, the composition of rocks, high temperatures, vegetation and wind. In a hot and wet environment, weathering tends to be rapid. In dry climates, weathering is slower.Full Answer >
Basal transcription factors are specific proteins that bind with DNA to begin transcription, the process of DNA being copied into primary transcript mRNA. Basal transcription factors are also important in regulating gene expression.Full Answer >
Factors such as topography, fuel types and weather affect fire behavior. There are other factors, including fuel load, that affect both unregulated and prescribed burns.Full Answer >