15.2 Born-Haber Cycle Our calculations of enthalpies so far have involved covalent substances. Now we need to look at the enthalpy changes involved in the formation of giant ionic lattices. Lattice enthalpy is defined as either the: ’the enthalpy change that occurs when one mole of a solid ionic crystal is broken into its ions in the gaseous state‚ at standard temperature and pressure. Because all the bonds in the ionic lattice are broken‚ it is an endothermic process‚ ∆H is positive. ’ The
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An Introduction to Qualitative Analysis Purpose: Tests the ions of Mg2+‚ Ca2+‚ Sr2+‚ and Ba2+‚ and identify them separately. By using these observations‚ identify the unknown ion. Then tests the ions of SO42-‚ CO32-‚ Cl-‚ and I-‚identify them separately‚ and use the observation to identify the unknown. Procedure Part I - Qualitative Analysis of Group 2 Elements Mix 0.02M K2CrO4 with each Mg(NO3)2‚ Ca(NO3)2‚ Sr(NO3)2 and Ba(NO3)2 together. Secondly‚ mix 0.1M (NH4)2C2O4 instead
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measurement of transference number ~ 1900 (Walther Nernst) Discovery of “ Nernst glower” – a ceramic rod was heated to incandescence → SOFC (solid oxide fuel cell)‚ oxygen gas sensor 1914 1966 (Tubandt & Lorenz) High Ag+ conductivity of AgI at 150oC (Ag/AgI/Ag) (Kummer & Webber @ Ford Motor) Developed Na/S battery by using Na+ conductor “sodium beta alumina (β-Al2O3)”. 1973 (P. V. Wright) 1978 (M. B. Armand‚ J. M. Chabagno‚ M. Duclot) First polymer electrolyte 5 Conduction Mechanisms Vacancy
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Effect of light on Silver Halide Salts Aim: To investigate the effect of sunlight and UV light on silver salts and to identify an application of this reaction. Hypothesis: The compounds exposed to sunlight (which already contains UV light) will decompose. The compounds which are not exposed to light (put in a dark place) will not decompose. Theory: Equipment: * 4 x petri dishes * 1 x glass stirring rod * 0.1 mol/L silver nitrate in a dropper bottle * 0.1 mol/L Sodium chloride
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agi 1. The difference of Coupled and Decoupled payments? Farm payments were coupled to production once upon a time. The more farmers produced the more they received in payments. Under these conditions it did not take long for people to come to the conclusion that farmers were farming the program and not making production decisions based on market prices and conditions. As a result‚ it was argued that the payments led to distortions in the marketplace resulting in excessive production in
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Chapter 1 INTRODUCTION Background of the Study Information technology has transformed the way companies conduct business. Technology allows businesses to automate manual operations and process information much faster. In the past‚ these methods consisted of person to person referrals and paper ads in newspapers and magazines. In the modern times of technology‚ there are new ways that companies are breaking out into the computer world through advertising and marketing. Probably the most innovating
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Marsha-Ann Boyea SOC 240 Professor Ortiz Lost Angels: Skid Row Is My Home Lost Angels: Skid Row Is My Home is an investigative documentary that gives us the untold story of the homeless and disadvantaged living on Skid Row. Skid Row is a name given to fifty blocks radius in Downtown Los Angeles whose residents tends to have a lower income or are homeless. Many people view the homeless as being dirty‚ poor and even lazy; it is very rare that we wonder why how they came to be in such a predicament
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Transhumanism Transhumanism is “the belief or theory that the human race can evolve beyond its current physical and mental limitations‚ especially by means of science and technology.1” Through advancement in technology‚ transhumanists seek to improve human capacities. Their ultimate goal is to develop a better society through curing diseases‚ improving the quality of life‚ advancing social connections‚ and even helping the poorest population with technology. There are many means of transhumanism
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Short history of Homosexuality The folk wisdom that Filipinos are a gay-friendly people must have first been mouthed by a wide-eyed tourist one lazy orange afternoon‚ assaulted by the vision of flamboyant transvestites sashaying down Manila’s busy sidewalks in broad daylight. Swiveling their hips from side to side‚ nothing seemed to threaten these chirping damsels except their heavy pancake makeup‚ which could run at any moment under the sweltering tropical sky. When visitors to the Philippines
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MACC-650 Seminar in Federal Taxation Spring 2010 Team Research Project Presentation to John Smith KMCE & A GOLD Gold Group KMCE & A Gold LLC Lawrenceville‚ NJ Dear Mr. Smith‚ We have been requested to review and present to you our recommendations for the start of your new Pharmaceutical/Biotech Consulting Company. To begin‚ we would like to review the information that we have been given from you to KMCE&A. We understand that you have a background as a business executive
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