Quick Answer. Most wool comes from sheep, although some wool is harvested from goats, muskoxen, rabbits and certain camelid species. Wool produces a unique textile with qualities that cannot be found in fur, such as its crimped texture, elasticity and tendency to grow in clusters for easy harvesting. Continue Reading.
1 A decrease in particle size causes an increase in the solid's total surface area.  Raising the reaction temperature by 10 Â°C can double or triple the reaction rate. This is due to an increase in the number of particles that have the minimum energy required. The reaction rate decreases with a decrease in temperature.
At higher temperatures, the molecules of the reactants move faster; therefore, collisions occur more frequently, a higher percentage of collisions are effective, and the reaction rate increases. A general rule of thumb is that on average, the reaction rate doubles for every 10Â°C rise in temperature.n this experiment, you will study various conditions and the effect they have on the collision of molecules. You will observe the effects of temperature, concentration, particle size (surface area), and catalysts on the rates of chemical reactions and then explain these effects in terms of the collision theory.