kvt\ln°msXbpamWv \mw Pohn°p∂Xpw acn°p∂Xpw. kµ¿`w Bhiys∏Sp∂ps≠¶n¬ AXnsemcp ¢otjbpan√. {]WbIYt]mse as‰¥p ¢otjbmWp≈Xv. ckIcambn ssIImcyw sNøp∂nStØmfw Imew AXv \ne\n¬°p Ibpw sNøp∂p’’. hn{ipX \S\mb Nm¿en Nmπn≥ C‚¿hyq°mc\mb dn®m¿Uv sadnamt\mSv ]d™XmWv Cu hm°pIƒ. AtX‚ PohnXsØ FgpXm\mWv Hmtcm FgpØpImcpw {ian°p∂Xv. AhnsSbmWv Nm¿en Nmπns‚ hm°pIƒ tN¿∂pt]mIp∂Xv. Nnc]cnNnXhpw \nch[n BfpIƒ FSpØp{]tbmKn°p∂Xpamb PohXsØØs∂ FgpXphm≥ XpSßptºmƒ AXv D]tbmKn®p]gInb Id≥kn t]mse apjn™p t]mbn´pw Id≥knbmbXn\m¬ D]tbmKnt°≠n
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of each type and the total charge must be equal on each side of the equation. Equations 1) Cu + 4H+(aq) + 2NO3-(aq) Cu2+(aq) + 2NO2 + 2H2O 2) Cu2+(aq) + 2-OH(aq) Cu(OH)2 3) Cu(OH)2 + heat CuO + H2O (Balanced) 4) CuO + H2SO4 Cu2+(aq) + SO42-(aq) + H2O (Balanced) 5) Cu2+(aq) + Zn + Cu + Zn2+(aq) (Balanced) Stage 1 Dissolution of Copper Mass of vial
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Introduction to Materials Science and Engineering Chapter 1. Introduction Hyung-Joon Shin School of Mechanical and Advanced Materials Engineering Ulsan National Institute of Science and Technology (UNIST) UNIST 2011 Spring AME20201 Introduction • Course Objective: Introduce fundamental concepts in Materials Science • You will learn about: • material structure • how structure dictates properties • how processing can change structure the final grade. Please actively take part in the class
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(well‚ it is chemical potential energy to be precise. Concentration gradient is not sufficient condition for diffusion.) Interdiffusion • Interdiffusion: In an alloy‚ atoms tend to migrate from regions of large concentration. Initially Cu 100% 0 After some time Ni 100% Concentration Profiles 0 Concentration Profiles DIFFUSION MECHANISMS Substitutional diffusion and interstitial diffusion (1) Substitutional (Vacancy) Diffusion: • applies to substitutional impurities
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1. a. The simulation indicates that 584 is the optimum stocking quantity. Daily profit at this stocking quantity is $331.4346. b. Using the newsvendor model‚ Cu = 1 - 0.2 = 0.8 and Co = .2. Cu /(Cu + Co) = .8. Using the spreadsheet‚ we found Q* = NORM.INV(.8‚500‚100) = 584.16. The simulation and newsvendor model give the same optimal stocking quantity. 2. a. According to the simulation spreadsheet‚ 4 hours of investment in creation maximizes daily profit at $371.33. b. Sheen would choose an
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Stages of Economic Integration: From Autarky to Economic Union As international trade and investment levels continue to rise‚ the level of economic integration between various groups of nations is also deepening. The most obvious example of this is the European Union‚ which has evolved from a collection of autarkical nations to become a fully integrated economic unit. Although it is rare that relationships between countries follow so precise a pattern‚ formal economic integration takes place
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reduction potentials is an e.m.f value of a given half-cell in relative to hydrogen cell. Galvanic cell - when zinc metal placed in CuSO4 solution‚ following reaction takes place: Oxidation: Zn(s) Zn+2 + 2e-1 Reduction: Cu+2 + 2e-1 Cu Overall: Zn(s) + Cu+2 Zn+2 + Cu(s) The salt bridge is necessary to complete the circuit and maintain charge neutrality. Zn+2 cathode SO4-2 anode Measuring the strength of oxidizing and reducing agents – standard electrode potentials provide
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Investigation: Developing an Activity Series for Metal Copper (II)‚ Magnesium and Nickel Tong Wu Question: “What is the effect of solution type and metal type on metal reactivity as measured by whether a chemical reaction has taken place? ” Prediction: *Using metal magnesium as an example illustration I. (Magnesium reacts with lead (II) nitrate) Mg + Pb(NO3)2 Pb + Mg(NO3)2 II. (Magnesium reacts with zinc nitrate) Mg + Zn(NO3)2 Zn + Mg(NO3)2 III. (Magnesium reacts with
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Material (+ & -) Temperature Range °C (°F) Sensitivity@ 25°C (77°F) µV/°C (µV/°F) E Chromel & Constantan (Ni-Cr & Cu-Ni) -270~1000 (-450~1800) 60.9 (38.3) J Iron & Constantan (Fe & Cu-Ni) -210~1200 (-350~2200) 51.7 (28.7) K Chromel & Alumel (Ni-Cr & Ni-Al) -270~1350 (-450~2500) 40.6 (22.6) T Copper & Constantan (Cu & Cu-Ni) -270~400 (-450~750) 40.6 (22.6) R 87% Platinum/ 13% Rhodium (Pt & Pt-Rh) -50~1750 (-60~3200) 6 (3
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Journal of Environmental Sciences 20(2008) 1–13 Research progress of novel adsorption processes in water purification: A review QU Jiuhui ∗ State Key Laboratory of Environmental Aquatic Chemistry‚ Research Center for Eco-Environmental Sciences‚ Chinese Academy of Sciences‚ Beijing 100085‚ China. E-mail: jhqu@rcees.ac.cn Abstract As an effective‚ efficient‚ and economic approach for water purification‚ adsorbents and adsorption processes have been widely studied and applied in different aspects
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