1-INTRODUCTION:- The increasing demand of electrical power in cities and industrial centres necessitates the installation of a compact and efficient distribution and transmission network. High voltage gas insulated switchgear (GIS) is ideal for such applications. The range of application of SF₆ Gas Insulated Switchgear extends from voltage ratings of 72.5 kV up to 800 kV with breaking currents of up to 63 kA‚ and in special cases up to 80 kA. Both small transformer substations and large load- centre
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QUESTIONS a) When it is considered that rain is acid? = The pH scale measures how acidic an object is‚ when pH is lower than 7 rain is considered acid. b) Which are the compounds that in contact with water origin acid rain? = Compounds like sulfur sulphuric and nitric acids. c) Which are the principal causes of these compounds? = The extra acidity in rain comes from the reaction of primary air pollutants‚ primarily sulphur oxides and nitrogen oxides‚ with water in the air to form strong
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MANUFACTURE OF SULPHURIC ACID IN INDUSTRY 1. Contact process produces more than 90% of the world’s sulphuric acid. 2. The raw materials used for the manufacture of sulphuric aced are sulphur‚ air and water. 3. The Contact process consists of three stages. a) Production of suphur dioxide b) Conversion of sulphur dioxide to sulphur trioxide. c) Production fo sulphuric acid 4. Stage I: Production of sulphur dioxide a) Sulphur is burnt in air to produce sulphur dioxide. S(s) + O2 (g)→SO (g) b) Burning
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information. The simplest compounds contain just two elements. Sodium chloride‚ NaCl‚ is an example of a binary compound. Several other examples are listed below. Potassium bromide KBr Calcium bromide CaBr2 Lithium fluoride LiF Lithium oxide Li2O When naming binary compounds follow these rules: 1. the element with the positive ionic charge is written first. 2. The second word is formed by changing the ending of the name of the element to “ide.” For example‚ bromine changes to bromide.
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In 1952‚ a toxic smog covered London. This fog continued to blanket the city for four days. Although this is a short period of time‚ the smog had a fatal aftermath. This still continues today and affects the people who were exposed to the toxic fumes. There were many things that contributed to the way the smog started‚ ended‚ and how it became toxic. One main reason why the smog started and lasted so long was because of the weather. There was a high-pressure air mass stalled over the Thames
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“ Food Preservatives” Submitted in Partial Fullfillment of the Requirements for the subject of Advance Chemistry IV to the Pisco Private School By: Mary Maren M. Guanlao 4th year Blaise Pascal Mary Maren M. Guanlao Mrs. Maria Dulce Bongon Adv Chemistry IV 12‚ April 2013 Food Preservatives Food is all around us and is necessary for everyday survival. Yet it has become so different from what it used to be. With the
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Thermal Runaway Reactions Plan Hypothesis: In this experiment‚ my hypothesis is that‚ the more concentrated acid there is‚ the bigger the temperature change in the experiment. This is because there are more acid particles to collide & react with each other. Equipment: * Beaker (100cm3) * Assorted measuring cylinders * Stopwatch * Thermometer * 0.1g of magnesium powder * 10cm3 of sulphuric acid Method: First‚ I will measure the correct amount of magnesium I need‚
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allow Southern the needed capital to invest in other projects in the future. In my analysis‚ I looked at the possibility of purchasing and installing scrubbers as pollution control equipment‚ which would create a 90% reduction in your generated sulfur dioxide emissions. Initially‚ this appears to be an excellent strategy; however‚ there exists many constraints. The first constraint is the cost. The scrubbers would cost over $719 million over a three year span. And even though you could depreciate
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THE CONTACT PROCESS By: Kabeer Ali Teacher- Mrs. Sankar Class- Lower6 Science 2 INTRODUCTION The Contact Process is the name given for the manufacture of Sulphuric Acid (H2SO4(l)). There must also be specific conditions of temperature‚ pressure and catalyst for the reaction to occur effectively. I will also look at the effect of temperature‚ pressure and catalyst on the composition of the equilibrium mixture‚ with respect to Le Châtelier’s principle. THE PROCESS Firstly‚
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Investigate the Effect of Acid Rain on Building Materials Question: What is the effect of 6M sulfuric acid (H2SO4) on the corrosion rate of the 3 grams of steel as the amount (number of sprays) of sulfuric acid increases? Variables: Independent variable: the number of sprays of 6M sulfuric acid (0‚ 5‚ 10‚ 15‚ 20‚ 25 times) to observe its effect on the corrosion rate. Each spray will contain about 10mL. Dependent variable: The corrosion rate. It will be calculated by measuring the mass of steel
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