Mason’s poem divided into four parts is principally about the ironies of power. It teaches a very simple moral lesson--however powerful may one be‚ the real power is a power of unity. All the powerful entities would have to remain united to exercise their power or make something out of it. On the other hand‚ if they use their power against each other‚ they will only end up crushing each other‚ neutralizing their powers and all of them would have die all alone. The stone‚ the first declares his
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CHAPTER I INTRODUCTION 1.1 HISTORY: Ethylene Glycol (1‚ 2 – ethanediol)‚ HOCH2CH2OH usually called glycol is the simplest Diol. Diethylene glycol and Triethylene glycol are Oligomers of Mono ethylene glycol. Ethylene glycol was first prepared by Wurtz in 1859; treatment of 1‚2 dibromoethane with silver acetate yielding ethylene glycol diacetate via saponification with potassium hydroxide and in
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monoprotic acid. The concentration of HC4H4O6- can be determined by titrating it against a standardised strong base. HC4H4O6-(aq) + OH-(aq) → C4H4O6-2(aq) + H2O(l) In this experiment‚ NaOH is used. As the HC4H4O6- and OH- ions will react in a 1:1 molar ratio‚ the concentration of HC4H4O6- can be obtained from calculating the moles of OH- used. From here‚ the Ksp values can be obtained by repeating the experiment at various temperatures. The Ksp and temperature relationship may be shown through
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Zinc Tris-thiourea Sulfate (ZTS) is a Semi Organic Nonlinear Optical (NLO) material which finds applications in the area of laser technology‚ optical communication‚ data storage technology‚ and optical computing etc. The author has successfully grown ZTS crystal by gel method. Gel technique has been adopted at ambient temperature to attain better result. The grown crystals were transparent and colourless. The crystal size has been obtained the range about 5mm X 3mm X 2mm. Thermal study of ZTS crystal
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Experiment 1: Neutralization of Acids and Bases In this experiment‚ you will learn how to properly neutralize and dispose of acidic and basic solutions. Materials 5 mL 4.5% Acetic Acid (vinegar)‚ C2H4O2 (1) 10 mL Graduated Cylinder 8 Litmus Test Strips (Neutral) Permanent Marker 2 Pipettes 1 g Sodium Bicarbonate (baking soda)‚ NaHCO3 4 Weigh Boats *Water *You Must Provide Procedure 1. Use the permanent marker to label three of the weigh boats as A - C. 2. Measure and pour approximately
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sheet. 8810-6105 13 pages © International Baccalaureate Organization 2010 0113 –2– N10/4/CHEMI/SP2/ENG/TZ0/XX SECTION A Answer all the questions in the spaces provided. 1. The data below are from an experiment to measure the enthalpy change for the reaction of aqueous copper(II) sulfate‚ CuSO4 (aq) and zinc‚ Zn (s). Cu 2+(aq ) + Zn (s) → Cu (s) + Zn 2+(aq ) 50.0 cm3 of 1.00 mol dm–3 copper(II) sulfate solution was placed in a polystyrene cup and zinc powder was added after
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acid + metal -------->salt + hydrogen acid + metal oxide--->salt + water acid + metal carbonate---->salt + water + carbon dioxide Element | Symbol | Valency | Hydrogen | H | 1 | Oxygen | O | -2 | Carbon | C | 4 | Calcium | Ca | 2 | Iron | Fe | 2 | Aluminium | Al | 3 | Sodium | Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH
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By definition‚ an isomer has the same chemical components as a given substance‚ but a different chemical structure. Piperine fits the part as it is exactly that. Since it has the same chemical components‚ it has the same molar mass‚ 285.34g/mol. Piperine comes from the piperaceae plant family‚ which grow peppercorns that are used as spices in the every-day kitchen‚ which is why it is responsible for the pungent taste in black pepper. In medicine‚ piperine is used to treat
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2O2(g ) ¡ CO2(g ) ϩ 2H2O(l ) ⌬H ϭ Ϫ890 kJ Burning 1 mol of methane releases 890 kJ of heat. The heat of combustion (⌬H) for this reaction is Ϫ890 kJ per mole of carbon burned. Like other heats of reaction‚ heats of combustion are reported as the enthalpy changes when the reactions are carried out at 101.3 kPa of pressure and the reactants and products are in their physical states at 25°C. Figure 17.8 The combustion of natural gas is an exothermic reaction. As bonds in methane (the main component
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The Calorimeters Calorimeters are a device that can measure the heat that comes from burning an item. Simple Calorimeter A simple calorimeter is used to detect the enthalpy change when a fuel is burned. The fuel is burnt to heat a specific mass of water and then measure its rise in temperature. The word calorimeter comes from the Latin phrase calor which means heat. A simple calorimeter just consists of a thermometer attached to a metal container full of water suspended above a combustion chamber
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