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.Know More
Diffusion relies heavily on energy and movement. In any given environment, there are several factors that impact a molecule's mobility: size of the molecule, viscosity of the surroundings, interactions between macromolecules and the specific type of transportation that is used by the molecule. Because diffusion relies on movement and movement relies on the size of the molecule, there is a direct relationship between molecular size and diffusion rate.
Larger molecules necessitate larger amounts of energy to engage in the same level of activity as smaller molecules. If there is not sufficient energy to move a larger molecule, it resists the effects of diffusion and is unable to move from one area to the next. Increases in environmental heat or other extraneous factors also have an impact on the energy involved in the diffusion process and the rate at which a large molecule diffuses.Learn more about Molecular Biology & DNA
The rate of diffusion of all types is increased along with increasing temperature. Diffusion is really the result of random movements, rather than force, since random movements are more likely to move particles to areas of lower concentration from areas of higher concentration. Temperature is a measure of the kinetic energy within particles, and hotter particles move faster, causing diffusion to proceed more quickly.Full Answer >
Whether the solute is a solid or gas, its solubility in water is dependent on temperature such that an increase in temperature can make solids more soluble while gases become less soluble. This means that if the temperature of water is increased by heating it, then the solid solute will dissolve more quickly. However, for gases dissolved in water, the reverse occurs and solubility decreases with an increase in water temperature.Full Answer >
Molecular crystals are solids formed when molecules are weakly bound (can der Waals force) together in a lattice pattern or array that repeats throughout the crystal.Full Answer >
Examples of facilitated diffusion are the passing of K+ ions through a membrane with an aid of a potassium transport protein and the passing of glucose and amino acids with the aid of proteins called permeases. Retinol binding protein acts as a water-soluble carrier for retinol and fatty acids.Full Answer >