Social Relevance Report Caffeine Essay - 1787 Words

Social Relevance Report Chemistry TOPIC: CAFFEINE CONTENTS 1.0 INTRODUCTION 1-2 1.1 What is caffeine? 1.2 Social Significance 1.3 Overview 2.0 CHEMICAL BACKGROUND 3-5 2.1 Chemical Properties of Caffeine 2.2 Physical Properties of Caffeine 2.3 How Caffeine Works in the Human Body 3.0 SOCIAL SIGNIFICANCE 6-9 3.1 How caffeine affects the society? 3.1.1 Health 3.1.2 Caffeine Addiction and Withdrawal 4.0 CONCLUSION 10 BIBLIOGRAPHY 11 1.0 INTRODUCTION Figure 1.1 Coffee Beans (Clip Art, 2010) 1.1 What is caffeine? Caffeine is a white crystalline xanthine alkaloid (refer to Figure 1.2), a psychoactive stimulant drug which has a bitter taste. In 1819,†¦show more content†¦The report also includes how caffeine affects our society in terms of health, caffeine addiction, caffeine withdrawal and future actions to handle this very popular drug. 2.0 CHEMICAL BACKGROUND 2.1 Chemical Properties of Caffeine Figure 1.2 Chemical Structure of Caffeine The chemical formula of caffeine is C8H10N4O2 and its systematic or chemical name is 1,3,7-trimethylxanthine or 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione. Other names for caffeine are coffeine, theine, mateine, guaranine, or methyltheobromine (Helmenstine, 2010). As caffeine are alkaloids, compounds that naturally contain basic nitrogen atoms. Caffeine is a mild diuretic, meaning it increases the production of urine when consumed. This psychoactive drug is acts as stimulant. In humans, caffeine stimulates the central nervous system, heart rate, and respiration processes. It also has psychotropic (mood altering) properties (Helmenstine, 2010). 2.2 Physical Properties of Caffeine Pure caffeine is odourless, white in colour, looks like fleecy masses, glistening needles or powder and has a bitter taste. Table 1.1 Physical properties of caffeine Physical property Values/ Measurements Boiling point 178  °C (sublimes) Melting point 238  °C Density 1.2 g/cm ³ Volatility 0.5% Vapour pressure 101 kPa at 178  °C pH value 6.9 (1% solution) Solubility in water 2.17% Vapour density 6.7 g/m ³ Molecular weightShow MoreRelatedThe General Search Engine Architecture1137 Words   |  5 Pagesco-owned domains. Cassandra also came down hard on hidden text and hidden links. Brandy- From February 2004 Google rolled out a variety of changes, including a massive index expansion, Latent Semantic Indexing (LSI), increased attention to anchor text relevance, and the concept of link neighborhoods. 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