PPT-Diffusion in Gas

DIFFUSION DEFINITIONS Diffusion is a process of mass transport that involves the atomic or molecular motion In the simplest form the diffusion can be defined as the random walk of an ensemble of particles from regions of high concentration to regions of lower concentration. What is chemical diffusion coefficient and tracer diffusion coefficient How are they inter related as D 1 ln ln Understand the meaning of th thermodynamic factor 1 ln ln and the relationship with the free energy gradient 1 ln ln 1 ln ln 1. Diffusion Ordered Spectroscopy. Provides a way to separate different compounds in a mixture based on the differing translational diffusion coefficients (differences in the size and shape of a molecule). Nick Gude. Period 3. M. . Pietrangelo. Problem Statement and Hypothesis. Which brand of bag will have the slowest diffusion rate?. Will the results prove significant enough to be able to claim that that brand(s) has the best plastic content?. Diffusion: The motion of atoms through matter. Diffusion Couple: An assembly of two materials in such intimate contact that each diffuse into each other. Ficks. First law of Diffusion:. The flux of diffusing species is proportional to the concentration gradient. A study in semiconductor physics. Ashley Finger and Dr. Tim Gfroerer. Davidson College. Introduction. Properties and behavior of semiconductors.. What are semiconductors?. University of Colorado at Boulder. “Semiconductor Fundamentals.” Accessed 4 Dec. 2013. ecee.colorado.edu.. The Cell in its Environment. Ch 7, Section 2. L3 Biology. Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Diffusion. Movement of molecules from an area of high concentration to an area of lower concentration . CHAPTER 2/ O’LEVEL BIOLOGY 5090 / GCE.. 2. Diffusion and osmosis. Content. 2.1 Diffusion. 2.2 Osmosis. 2.3 Active . transport. Learning outcomes. Candidates should be able to:. (a) define diffusion as the movement of molecules from a region of their higher concentration to a region of. Gary Hui Zhang, PhD. Microstructure Imaging Group. Centre for Medical Image Computing. Department of Computer Science. University College London. 26th of June, 2013. UCL Centre for Medical Image Computing. Lecture 17. Fick’s First Law. Last time we introduced Fick’s First Law. Note minus sign. This means diffusion moves down the concentration gradient, i.e., from high to low concentration.. Deriving Fick’s Law. Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Concentration gradient. Concentration Gradient - change in the concentration of a substance from one area to another.. Calisthenics: . BIG QUESTIONS. Big Word of the Week:. Cultural Diffusion. Big question of the Day:. How is culture affected by the interaction of people from different places and cultural groups?. Big Questions of the Week:. 2. converting enzyme. Jochen Blumberger. University College London, UK. CCSWS4 workshop, IPAM. Los Angeles, 18 May 2011. Methods and properties. Observables:. -ionic structure. -electronic structure. Molecules move randomly & rapidly in relation to each other. Net diffusion is from [high] to [low]. Partial pr. of the gas is proportional to [gas]. .  nitrogen  79% 600 mmHg.  Oxygen  21% 160 mmHg. A) 4.82 moles of N. 2. B. ) . 5.53 moles of N. 2. C) 6.02 moles of N. 2. D) 9.64 moles of N. 2. Dalton. ’. s Law of Partial Pressure Continued. So what if we said:. n. total. = n. 1. + n. 2. + n.