chemistry 5 questions Fire Dynamic assignment

Apr 22nd, 2015
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1. Thiazole (C3H3NS) occurs natrually as part of vitamin B1 (thiamin) such as in pasta and bread. Thiazoles have anti-tumor and anti-viral properties but most thiazole compounds are flavourings. If it is combusted perfectly in air the products are carbon dioxide, water, hydrogen sulphide (H2S) and nitrogen. What is the balanced reaction? [8 marks] What is the RMM of thiazole? [2 marks] What is the fuel-air mass ratio? [5 marks] What is the oxygen depletion? [4 marks] What is the yield of CO2? [2 marks] What is the yield of H2O? [2 marks] What is the yield of N2? [1 mark] For ideal combustion, what is the yield of carbon-monoxide? [1 mark] You may assume the composition of air is 21% O2 and 79 % N2. A periodic table is provided overleaf, should you need one. [25 marks for this question] 2. Critically review and distinguish superficial, partial-thickness and full thickness burns and explain the significance of ‘eschar’. How would eschar

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11. What is the balanced reaction? Answer: 20C3H3NS +60O2=60CO2+ H2O+20H2S +10N22. What is the RMM of thiazole? Answer: RMM= (12*3)+(3*1)+(14)+(32)= 853. What is the fuel-air mass ratio? Answer: Fuel-air ratio= 20/60= 0.33334. What is the oxygen depletion? Answer: Assume mass of oxygen= 21g Moles= 21/16= 1.3125moles Depletion rate= 60*1.3125= 78.75 Moles/sec5. What is the yield of CO2? Answer: 85g ofthiazole gives 44g theoretically 37.19gproduces mass of CO2= 37.19*44/85= 19.25g which is the yield of CO26. What is the yield of H2O? Answer: 85g = 18g 37.19= ? Yield of water= 37.19*18/85= 7.86g7. What is the yield of N2? Answer: Yield of nitrogen= 37.19*32/85= 14 g8. For ideal combustion, what is the yield of carbon-monoxide? Answer: Yield of CO= 37.19*28.01/85= 12.26g2When we start working on burn it is important to decide the burn profundity because it is critical. Things to consider are temperature, system, span of contact, blood stream to skin, and anatomic area (Clarke J. Burns, 1999, 55). Epidermal profundity differs with body surface, which can offer differing degrees of warm insurance. More established grown-ups and youthful kids likewise have more slender skin. Superficial burns To start with degree: Incorporates just the external layer of skin, the epidermis Skin is generally red and extremely difficult Proportionate to shallow sunbur

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