Year 11 Module 1 – The Chemical Earth The Earth is made up of a large number of different substances: elements‚ compounds & mixtures We can classify elements & compounds as pure substances. These are always HOMOGENEOUS. Mixtures are not pure substances and can be either homogeneous or HETEROGENEOUS. Pure substances have a fixed composition eg copper metal‚ sulfur‚ carbon dioxide (CO2)‚ methane (CH4). Mixtures have variable composition and can also be separated into its components relatively
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The Rate of a Reaction The area of chemistry that deals with the rate or speed of chemical reactions is known a chemical kinetics. The word “kinetic” is derived from the Greek name kinitikos that means movement or motion. In the present context‚ the kinetic means the reaction rate or rate of a reaction that is defined as the change in concentration of a reactant or a product with time (M/s). Chemical reaction can be represented by the following general equation. Reactants Products It is very important
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(9H/100+M/100) II-1 CHEMICAL REACTIONS Combustion C + O2 = CO2 + 32‚790 kJ/kg of carbon‚ Heat of formation at 25C is 393.7 kJ/mol [Perry p-2-188] mCn Hm + (n +m/4)O2 = nCO2 + m/2 H2O + Q S + O2 = SO2 + 9260 kJ/kg of sulfur Calcination CaCO3 = CaO + CO2 – 1830 kJ/kg of CaCO3gCO3 = MgO + CO2 – 1183 kJ/kg of MgCO3. Sulfation CaO + SO2 + 1/2 O2 = CaSO4 + 15141 kJ/kg S. Basic Stoichiometry C + O2 = CO2 + q 1 kmol of carbon combines with 1 kmol of oxygen to
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“Mercury(II)oxide” “orange red” 2HgO 2Hg + O2 1.The amorphous powder changes to dark red and appears almost black. 2.It gives off a colourless‚ odourless gas which relights a glowing wooden splint 3. A silvery mirror like surface is formed near the mouth of the test tube. On scratching the surface ‚it forms tiny droplets of mercury 4.Gaseous product -oxygen and residueMercury http://foricseandbeyond.blogspot.in/ SILVER(I)OXIDE 2Ag2O 4Ag + O2 1.The amorphous greyish powder on heating
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Travel paper One of life’s pleasures is to obtain the ability to travel. I myself like most envisioning myself to someday travel the world and visit various cultures. Currently being employed part-time and being a full time student this will not be possible anytime soon‚ writing this assignment allows me to plan what I might do in the future. I love to learn about my own family history and for the two trips im going to go on are going to be from my maternal and paternal sides of the family. First
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PATHOPHYSIOLOGY Medical Diagnosis: Cholecystitis/Cholelithiasis Nursing Diagnosis: Activity intolerance r/t laparoscopic abdominal incisions AEB SOB during ambulation‚ increased respirations at 38‚ O2 sat 80% room air after walking 50 ft. Normal Physiology: The gallbladder is situated inferior to the liver. The gallbladder is a structure that functions as a storage space for bile that is produced in the liver. The liver produces and secretes bile
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Decomposition of Sodium Chlorate to Create Oxygen Gas Introduction: There are several types of chemical reactions. Those reactions include synthesis‚ decomposition‚ single replacement‚ and double replacement. In this experiment‚ we will be decomposing sodium chlorate to create oxygen gas. In a decomposition reaction‚ a chemical compound is being separated into elements or simpler compounds. AB → A + B is a simple way of expressing what happens in a decomposition reaction‚ AB break down into A
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colourless. MnO4-: Manganate(VII) ion (Purple) Mn2+: Manganese(II) ion colourless Decomposition of Hydrogen Peroxide 2H2O2 - ⎯→ 2H2O + O2 Catalyst: manganese(IV) oxide(MnO2)‚ Iron(III) oxide (Fe2O3)‚ silver (Ag) Haber Process (Manufacture Ammonia) N2 + 3H2 ⎯→ 2NH3 (More detail in Form 4 Chapter 9) Contact Process(Manufacture Sulphuric Acid) 2SO2 + O2 ⎯→ 2SO3 (More detail in Form 4 Chapter 9) http://www.one-school.net/notes.html 2 ONE-SCHOOL.NET Ostwald Process (Manufacture
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The Advanced Placement Examination in Chemistry Part II - Free Response Questions & Answers 1970 to 2007 Thermodynamics Teachers may reproduce this publication‚ in whole or in part‚ in limited print quantities for non-commercial‚ face-to-face teaching purposes. This permission does not apply to any third-party copyrights contained within this publication. Advanced Placement Examination in Chemistry. Questions copyright© 1970-2007 by the College Entrance
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Augustine Aloysius Joyce was born on February 2‚ 1882‚ just south of Dublin in a wealthy suburb called Rathgar. The Joyce family was initially well off as Dublin merchants with bloodlines that connected them to old Irish nobility in the country. James’ father‚ John Joyce‚ was a fierce Irish Catholic patriot and his political and religious influences are most evident in Joyce’s two key works A Portrait as a Young Man and Ulysses. Dublin figured predominately in Joyce’s writings. Through this subject‚
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