Chapter 24 Essay Example | Topics and Well Written Essays - 2500 words

Chapter 24 - Essay Example Whereas the aromatic compounds are those compounds which have a cyclic carbon chain with alternating double bonds. A very important group of aromatic compounds includes benzene which is a cyclic compound with 6 carbon atoms and alternate double bonds. 24.3 The hydrocarbons in which the adjacent carbon atoms have only one carbon-carbon bond are called saturated hydrocarbons. These are called saturated compounds because all the four carbon valences are satisfied and no more hydrogen can be attached to the carbon atom. These hydrocarbons are represented by the formula CnH2n+2. Example of saturated hydrocarbon is ethane (C2H6). The hydrocarbons which contain one or more a double or triple bond in the compound are called unsaturated hydrocarbons. These compounds are called unsaturated because all the carbon valences are not satisfied by hydrogen atoms. The alkenes and alkynes are the examples of unsaturated compounds represented by the formula CnH2n and CnH2n-2. Example of unsaturated hydrocarbon is ethane (C2H4). 24.9 A carbon atom in a compound is called chiral, if the mirror image of this compound cannot be superimposed on itself. In a simplified way, if all the four substituent of a carbon atom are different, then such a carbon atom will be chiral. An example of such a compound is bromochlorofluoromethane. 24.25 CH3CH(NH2)COOH and CH2(OH)CH(NH2)COOH are chiral amino acids as all the four substituent of the central carbon atom are different, so the... 24.27 Structural formula of: a) 3-methylhexane b) 1,3,5-trichloro-cyclohexane c) 2,3-dimethylpentane d) 2-bromo-4-phenylpentane e) 3,4,5-trimethyloctane 24.31 Structures are: a) 1-bromo-3-methylbenzene b) 1-chloro-2-propylbenzene c) 1,2,4,5-tetramethylbenzene 24.34 Lewis Structure: a) Alcohol: b) Ether c) Aldehyde d) Ketone e) Carboxylic acid f) Ester g) Amine 24.41 The products are: a) CH3-CH2-COOH + H2O b) H2-C=CH-CH3 c) Not Clear 24.43 The possible isomers of C7H7Cl with a benzene ring are: a) b). c) d) 24.49 Given: Density of octane = 0.70 g/ml Volume of octane = 1 lt = 1000 ml Therefore; mass of octane is 700 g As the molecular weight of octane is 114.23 g/mole; so the total moles of octane burnt are (700/114) = 6.13 moles We know each mole of octane requires 12.5 moles of oxygen for complete combustion. Therefore for the combustion of 1 lt of octane, the oxygen required will be (12.5*6.13 =) 77.875 moles. It is known that volume of 1 mole of a gas at 20oC is 24.04 lt. So the volume of oxygen required would be (77.875*24.04 =) 1872.2 lt. Given that oxygen is 22% of the air. So the total volume of air required is (1872.2*100/22 =) 8510 lt. Answer: 8510 lt. of air is required for complete combustion of 1 lt. of octane. 24.53 The structural isomers of C4H8Cl2 are: 1. 1,1-dichlorobutane 2. 1,2-dichlorobutane This is a chiral structure. 3. 1,3-dichlorobutane This structure has a chiral carbon. 4. 1,4-dichlorobutane 5. 2,3-dichlorobutane This structure is chiral. 6. 1,1-dichloro-2-methyl-propane 7. 1,3-dichloro-2-methyl-propane 8. 1,2-dichloro-2-methyl-propane 24.59 The structure of: a) Cyclopentane b)

Integraded pop culture autobiography Essay Example | Topics and Well Written Essays - 1500 words

Integraded pop culture autobiography - Essay Example Especially in these contemporary times, pop culture is perceived more of a commercial culture, for the commercial value it has. Storey is of the opinion that popular culture emerges from the urbanization of people. Popular culture is an amalgamation of complex forces that are interdependent on each other and impact upon society in every possible way. However, popular culture is never static, but keeps on changing from time to time depending upon the likes and dislikes, tastes and trends of people in the society. It is possible for certain traits in pop culture to be influenced by a sub- culture and be manifested in society if its values are accepted and adopted by them. In comparing popular culture from the 1920’s until now, we find a huge difference in people’s way of life, their music, dance, movies, fashion, sport, art, literature and other media. However, this type of culture is quite popular because it is appeals to a very wide spectrum of people. The different med ia such as television, newspapers, radio and magazines contribute towards popularizing certain aspects of culture mainly to do with entertainment. In this essay an attempt is being made at investigating and analyzing important aspects of popular culture in the 1920’s and today and trying to find out the similarities and differences by comparing the different periods. Music Music in the 1920’s was quite unlike the music that we hear today. The 1920’s is the period when Jazz was most popular. Some of the popular singers and composers of the ‘Jazz Age’ were Louis Armstrong, Duke Ellington and George Gershwin and the like who changed the face of music during the 1920’s. Gershwin composed some of America’s most popular music such as musical comedies, film scores, songs, opera and his concert composition called ‘Rhapsody and Blues’ (Classical piano and Jazz) during the 1920’s. Some of the famous cartoon characters introdu ced during the 1920’s were Mickey Mouse, (1928) Winnie the Pooh and Betty Boop. However, music in the 21st century has been revolutionized due to the changing times. Most of the modern generation is comfortable with Hip- hop, Rap, Alternate Rock and Rock music as they identify themselves with it and feel that they could express themselves in a way they want. However, Classical music of the ancient period is evergreen even today and has served to influence modern composers. Some compositions that have a world vision and carries a special message for guiding the world to peace and harmony are not only popular but but instill positive attitudes among the people. Marley’s music falls under this category and his song which had the line ‘One love, one heart, let’s get together and feel alright’ (Michael A Stusser, pg. 376) brought inspiration to the hearts of the freedom fighters during the struggle between Zimbabwe and Britain. The Jamaican Government re cognized his great contribution in the arts and awarded him the ‘Order of Merit in 1981. (Michael A Stusser, pg. 376) On the music front, my most favorite Classical composer is Beethoven, while my most admired artist of contemporary music is Eminem. Dance Dance took on a revolutionary turn during the 1920’s after experiencing the restriction and horrors of the war. People went all out to release their pent up emotions brought about by restriction in their