Diffusion is a physical phenomenon that occurs everywhere, and we barely notice it or understand how it works. Diffusion definition and examples biology online dictionary. Diffusion explains why an open bottle of ammonia will fill an entire room. Diffusion rates are fastest when a large concentration difference exists on either side of the unit area. Terms starting with s chemistry dictionary and glossary. It is the ideal reference resource for students of chemistry of all levels, covering all aspects of chemistry, from physical chemistry to biochemistry. Osmosis is the result of diffusion across a semipermeable membrane. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Use this a to z chemistry dictionary to look up definitions of important. Diffusion is the movement of a solute in a solvent, which is controlled by a gradient in concentration. Chemistry dictionary definition of diffusion a hightemperature process in which desired chemicals dopants on a wafer are redistributed within the silicon to form a device component. Diffusivity or diffusion coefficient is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species or the driving force for diffusion. The particles suspended in liquids and gases, for instance, struck each other resulting in their random constant motion.
A distinguishing feature of diffusion is that it results in mixing or mass transport, without requiring bulk motion. Fully revised and updated, the seventh edition of this popular dictionary is the ideal reference resource for students of chemistry, either at school or at university. Any opinions in the examples do not represent the opinion of the cambridge dictionary editors or of cambridge university press or its licensors. Diffusion is the movement of a fluid from an area of higher concentration to an area of lower concentration. Facilitated diffusion synonyms, facilitated diffusion pronunciation, facilitated diffusion translation, english dictionary definition of facilitated diffusion. The process of diffusion is critical to life, as it is necessary when our lungs exchange gas during breathing and when our cells take in nutrients. Diffusion is one of the most important phenomena in fields such as biology, chemistry, geology, chemistry, engineering and physics. The theory is that both of these result from the random motion of microscale individual agents such as molecules giving rise to net changes on the macroscale. Diffusion coefficient definition by babylons free dictionary. Diffusion definition is the state of being spread out or transmitted especially by contact. Chemistry dictionary chemistry dictionary for class12 blacks law dictionary free online legal dictionary second edition oxford picture dictionary third edition englisharabic dictionary blacks law dictionary free online legal dictionary 2nd edition latest 2015 above in foreign dictionary literature. Diffusion definition of diffusion by merriamwebster. The thin square plate is a typical example, and the simplest model of the behavior. Download our english dictionary apps available for both ios and android.
The free online english dictionary from macmillan education. Molecular diffusion article about molecular diffusion by. Chemistry dictionary terms starting with the letter s. Retaining the trademark enthusiastic style, the coverage now extends to biology and medicine. The sixth edition of the oxford dictionary of chemistry has over 4,700 entries, including over 200 new terms for this edition. The addon checks the spelling in american english of over 100,000 technical chemistry words. What is diffusion in chemistry, and what are its uses. The mcgrawhill dictionary of chemistry provides a compendium of 8000 terms. The easiest way to know about chemistry terminologies. Here you can find chemistry dictionary pdf shared files. If you download the netlogo application, this model is included. Whats the difference between diffusion and osmosis. Oct 08, 2016 an example would be semiconductors electronics where gasses are introduced into a capsule containing silicon wafers that have a mask on them to only allow the gas to interact with the silicon in specific areas making individual transistors as pa. Contains words related to organic chemistry, physical chemistry, inorganic chemistry etc.
Thus, diffusion should not be confused with convection, or advection, which. You can complete the definition of rate of diffusion given by the english definition dictionary with other english dictionaries. The chemistry glossary contains basic information about basic terms in chemistry, physical quantities, measuring units, classes of compounds and materials and important theories and laws. General chemistrydiffusion and effusion wikibooks, open. Molecular diffusion, often called simply diffusion, is the thermal motion of all liquid or gas particles at temperatures above absolute zero.
You may also be interested in our reagent table calculator widgets. Solute meaning in the cambridge english dictionary. Diffusion is driven by a gradient in concentration. Then you reverse on the the bottle, put it on top on the other bottle of gas, and then remove that piece of glass, you will see diffusion. Download dictionary of chemistry 2nded pdf from 3 mb, dictionary dictionary of chemistry, 6th editionoxford. Diffusion in solutions is the most important phenomenon in electrochemistry, but diffusion will occur also in gases and solids. Here we have made the additional assumption that vertical diffusion of solute is negligible. In physics, chemistry and biology, diffusion denotes the mixing of two or more substances or the net motion of a substance from an area of high concentration to an area of low concentration. Chemistry dictionary offline contains over 5000 chemical terms along with their scientific definitions. Diffusion is defined as the process or state of something spreading more widely. This is the process where the particles move from high concentration to low concentration. Download chemistry dictionary pdf files tradownload. All subjects are well categorized in home screen so you can choose which dictionary you want to use like physics dictionary for topics such as. Diffusion is the basis for many industrial processes, such as adsorption and case hardening.
Diffusion is driven by a gradient in chemical potential of the diffusing species and. Oct 20, 2018 diffusion is the spontaneous mixing of one substance with another when in contact or separated by a permeable membrane. The particles will mix until they are evenly distributed. Perfect for your trips or when no data connection is available. Definitions, meanings, synonyms, pronunciations, games, sound effects, highquality images, idioms and. After you download the dictionary, feel free to browse to the front page and have a look around. In a solution, a concentrated solute diffuses to spread evenly in its solvent. However, a few simple experiments can reveal the mysterious nature of this simple phenomenon. Diffusion is a result of the random motions of their component atoms, molecules, ions, or other particles. The number of randomly moving molecules that pass through a unit area per second. Translation for diffusion in the free englishchinese dictionary and many other chinese translations. This module explains diffusion and describes factors that influence the process. The rate of diffusion diffusional flux is proportional to the gradient of the concentration in the solution, with the proportionality constant called the diffusion coefficient.
Diffusivity is encountered in ficks law and numerous other equations of physical chemistry. The rate of this movement is a function of temperature, viscosity of the fluid and the size mass of the particles. Academic tutoring professional us based online tutors for. Diffusion meaning in the cambridge english dictionary. Diffusion is the spontaneous mixing of one substance with another when in contact or separated by a permeable membrane. With over 5000 entriesover 175 new to this editionit covers all aspects of chemistry, from physical chemistry to biochemistry. Search rate of diffusion and thousands of other words in english definition and synonym dictionary from reverso. Diffusion refers to the process of particles moving from an area of high concentration to one of low concentration. Wikipedia, lexilogos, oxford, cambridge, chambers harrap, wordreference, collins lexibase dictionaries, merriam webster.
Diffusion rate rate of diffusion definition by babylons. This overview of diffusion and separation processes brings unsurpassed clarity to this complex topic. A chemistry spellcheck dictionary for word processors. Diffusion in materials synonyms, diffusion in materials pronunciation, diffusion in materials translation, english dictionary definition of diffusion in materials. Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration. Diffusion takes place very rapidly in case of gases, to a lesser extent in case. Best app to find your definition this application is ideal for chemistry students. Diffusion, chapter notes, class 9, science class 9 notes. About chemistry abc has always been very supportive of the science community. Weve tested this download link and found it free of viruses and scams. Free oxford dictionary of chemistry apk download for android. Translation for diffusion in the free englisharabic dictionary and many other arabic translations.
Application chemistry dictionary offline contains over 3000 chemistry terminology covering all commonly encountered physics terms and concepts, as well as. Thousands of biology words and terms app is completely free, you dont have to pay anything ever alphabetical listing a search tool a learning tool. For students, diffusion goes from the basics of mass transfer and diffusion itself, with strong support through worked examples and student questions. Concentration definition, the act of concentrating.
If two solutions of different concentration are separated by a semipermeable membrane, then the solvent will tend to diffuse across the membrane from the less concentrated to the more conc. May 27, 2019 application chemistry dictionary offline contains over 3000 chemistry terminology covering all commonly encountered physics terms and concepts, as well as terms. A hightemperature process in which desired chemicals dopants on a wafer are redistributed within the silicon to form a device component. Free offline chemistry dictionary app containing over 15000 words and their type, definition for chemistry practitioners and students to look up the definitions and technical terms in a second. This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including. Facilitated diffusion definition of facilitated diffusion. Diffusion definition of diffusion by medical dictionary. Start using our chemistry dictionary offline app without creating an account, so, download it now and start using it within a few seconds. For example, a diffusion furnace facilitates the reaction of gases with silicon wafers at temperatures typically greater than 8005c to form silicon dioxide or to diffuse previously deposited dopants into the wafer. Diffusion in physics is the movement of particles from an area of higher concentration to an area of lower concentration as driven by thermal energy. Pdf a dictionary of chemistry download full pdf book.
Chemistry dictionary offline provide speech to text functionality in to searching words. Fully revised and updated, it boasts broader coverage in subject areas such as forensics, metallurgy. Try changing the shape or thickness of the plate e. In osmosis though, the movement has to occur across a semipermeable membrane.
Study the rate of diffusion introduction when substances are brought in contact with each other, they intermingle with each other. The file includes words not found in the users native dictionary. A free, downloadable spellchecker addon for word processors, created by the author, is described. The rate of this movement is a function of temperature, viscosity of the medium, and the size mass of the particles. The module looks at historical developments in our understanding of diffusion, from observations of dancing particles in the first century bce to the discovery. Chemistry 1 diffusion rate rate of diffusion translations. Sep 15, 2019 this alphabetical chemistry dictionary offers definitions and examples of important chemistry and chemical engineering terms. Diffusion of the molecules of solvent in liquid solutions through semipermeable membranes leads to the formation of osmotic pressure, which is used in the physicochemical separation method of dialysis. Diffusion definition and meaning collins english dictionary.
To test the feasibility of this diffusion microchip system, coomassie brilliant blue g250 bionovas, toronto, canada and potassium ferricyanide merck, darmstadt, germany were selected, respectively, as model color compounds for observing molecular diffusion through the donor cell into the receptor and sequential flow in the microchannel. This alphabetical chemistry dictionary offers definitions and examples of important chemistry and chemical engineering terms. The concept of diffusion is widely used in many fields, including physics particle diffusion, chemistry. Diffusion occurs most readily in gases, less so in liquids, and least in solids. Diffusion is when molecules of a liquid or gas move from a high concentrated.
Diffusion article about diffusion by the free dictionary. Osmosis is the net movement of solvent molecules through a semipermeable membrane. Diffusion and osmosis difference and comparison diffen. Diffusion results in the gradual mixing of materials, and eventually, it forms a homogeneous mixture. Each link leads to a more comprehensive discussion of the word. Macmillan dictionary free english dictionary and thesaurus. The diffusion coefficient for any given gas is proportional to the solubility and molecular weight of the gas. Prepare two bottles of different gas, such as chlorine and oxygen gas, and cover both bottle with a piece of glass. Learn about how particles move from an area of greater concentration to an area of lesser concentration through the process of diffusion. Is based on the mcgrawhill dictionary of scientific and technical terms for more than a quarterofacentury the standard international reference. Jul 29, 2019 diffusion is the movement of a fluid from an area of higher concentration to an area of lower concentration. Membership feels like a huge effort towards a strong, diverse. It is the editors hope that the second edition of the mcgrawhill dictionary of chemistry will serve the needs of scientists, engineers, students, teachers, librarians,andwritersforhighqualityinformation,andthatitwillcontribute toscientific literacy and communication.
Any opinions in the examples do not represent the opinion of the cambridge dictionary. Free download mcgrawhill dictionary of chemistry second edition from following external download link. Osmosis definition and examples biology online dictionary. Interestingly, before becoming a famous for the relativity laws, albert einstein wrote extensively about diffusion, and was one of the first to connect diffusion to the brownian motion of atoms. Experiment with concentration, temperature, mass, and radius and determine how these factors affect the rate of diffusion. It is similar to diffusion as the movement is downhill, meaning from higher to lower concentration.