Diffusion Essay -- essays research papers

Lab Report 1 DiffusionIntroductionThe serviceman body undergoes a variety of processes throughout each and e very(prenominal) day in order to sustain life. Tasks much(prenominal) as walking, breathing, and digesting what has been eaten are sometimes considered mundane, even taken for granted. One such process that is needful to maintain life is diffusion. Diffusion is a keystone factor in moving ions, fuels, and other molecules into and out of the blood. It is one of the near important components in supplying oxygen to the alveoli and removing carbon dioxide. Without diffusion, substances would find it very difficult to pass through membranes and could cause detrimental effects to the human body. The paradox scientists have drawn is related to glucose molecules and the directions in which the molecules endure to move. No single molecule should diffuse in any particular fashion, save should diffuse helter-skelter. This report looks at four cloaks attempting to solve the pro blem presented, how do the molecules know which way to diffuse? In order to understand the obtained research, it is necessary to present and identify the key components of Ficks Law of Diffusion F = -D * A*dC/dx F = the flow of material across a real or imaginary sheetD = the diffusivity of the diffusing molecules(the simplicity in which the molecule diffuses in the surrounding medium)A= area of the planeC= concentration of the molecules X= distancedC/dx = the concentration gradientThere will be four simulations conducted in order to accommodate Ficks Law and determine if molecules do in fact know which way to diffuse. The first simulation will look at a single molecule in an open area, the second looks at the proceeding of several molecules, the third looks at molecules diffusing in a ... ...te the pitch in concentration with respect to the change in distance. In example 4 we have two chambers connected with a thermionic vacuum tube. same simulation 2, the concentration o f molecules across the whole system at sense of balance is equally distri plainlyed. If the dimensions of the squall were small and narrow, only a small office of the molecules will be contained in the pipe at correspondence. The flow of molecules to the decent chamber would decrease. The calculation of the station of approach to equilibrium in simulation 2 cannot be applied here because we have a pipe of a different volume that alters the flow.As the figure above depicts, the rate of approach to equilibrium increase as the diameter of the pipe increases. save the rate of approach will not increase infinitely but will plateau as some point because the diameter of the pipe can only be so large to connect the boxes. Accordingly, change magnitude the length of the pipe will slower the rate of approach to equilibrium because the molecules will have to travel a greater distance. ReferencesDiffusion- Simulation of randomly moving particles WebCT. Drexel University. April 2005