Benzene, C(6)H(6), is a clear, colorless, flammable liquid that is insoluble in water.Its boiling point is 80 degrees C (176 degrees F). In the past benzene was obtained from
the distillation of coal in the absence of air. Today most benzene is made syntheticallyfrom petroleum products.
The benzene is a closed ring of six atoms connected by bonds that resonatebetween single and double bonds; each carbon is also bound to a single atom. Benzene isinsoluble in water but mixes in all proportions with organic . Benzene is itself an excellentsolvent for certain and for most simple organic chemicals. It is one of the most commonly
used solvents in the organic chemical laboratory.
If inhaled in large quantities, benzene is poisonous. The vapors are explosive andthe liquid violently flammable. Many compounds are obtained from benzene. It is alsoused in the manufacture of and in the production of important derivatives. Benzene andits derivatives are included in the important chemical group known as . When mixed with alarge proportion of , benzene makes a satisfactory . In Europe, benzene mixed with other
compounds has long been added to motor fuels.
Benzene was isolated in 1825 by Michael Faraday, but its structure remained amystery for 40 years. The problem was perplexing because the C(6)H(6) formula indicateda high degree of unsaturation, but benzene does...
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- 1. INTRODUCTION Benzene (also known as benzol) is a colourless and highly flammable liquid with a sweet odour. It evaporates into the air very quickly and partly dissolves in water. Most people can begin to smell benzene in air at approximately 60 ppm of air and recognize it as benzene at 100 ppm. It was first discovered and extracted from coal tar in the 1980s and subsequently from petroleum due to vast increase in its demand. Since then, various industries use benzene to make other chemicals, such as styrene, cumene and cyclohexane.... [tags: chemistry, chemical]
1712 words (4.9 pages)
- Extensive research has gone into the study of benzene in the body and unfortunately, early warning signs mimic less severe issues such as heat exhaustion or carbon monoxide exposure. It is imperative that workers who are susceptible to benzene exposure be aware of the warning signs and should be the duty of first line supervision to make this information available. Long term health effects of benzene exposure are real and present. The real danger from long term exposure of benzene is on the blood.... [tags: Red blood cell, Blood, Bone marrow, Immune system]
823 words (2.4 pages)
- Benzene is a chemical compound used in our everyday lives. Benzene is used to make chemicals and other household products. The chemical formula of Benzene is C6H6. Benzene’s atomic structure is a hexagon with a carbon atom and a hydrogen atom bonded to each shown in (Figure 1). When Benzene was first discovered it was called hydrocarbon. The chemical that we now call Benzene was discovered in 1825 by Michael Faraday. Michael Faraday discovered Benzene from an oily film that deposited from the gas used for lighting.... [tags: chemical, toxic, exposure]
844 words (2.4 pages)
- Benzene Benzene, C(6)H(6), is a clear, colorless, flammable liquid that is insoluble in water.Its boiling point is 80 degrees C (176 degrees F). In the past benzene was obtained from the distillation of coal in the absence of air. Today most benzene is made syntheticallyfrom petroleum products. The benzene is a closed ring of six atoms connected by bonds that resonatebetween single and double bonds; each carbon is also bound to a single atom. Benzene isinsoluble in water but mixes in all proportions with organic .... [tags: essays research papers]
516 words (1.5 pages)
- BROMINATION OF BENZENE SYNTHESIS AND PURIFICATION OF BROMOBENZENE: PROCEDURE DATA TABLE Chemical Boiling point C Melting Point C Density g/mL Solubility Benzene 80.1 5.5 0.88 Slightly in H2O Toluene 110.6 -93 0.87 Slightly in H2O Bromobenzene 155-156 -30.8 1.50 Insoluble Dibromobenzene 220.40 87.31 0.96 Insoluble MATERIALS: Graduated cylinder Weight scale Buchner funnel Filter flask Rubber stopper Hot plate Thermometer Conical funnel Various size beakers Fractionating column (for reflux) Various sized round bottom flasks Distillation head Condenser Vacuum adapter Clamps and stands Test tubes PROCEDURE:... [tags: essays research papers]
599 words (1.7 pages)
- Why does Benzene undergo only electrophilic substitution reactions. This property can be attributed to the remarkable stability of Benzene, due to the 6 delocalised electrons forming a ᴨ cloud of electrons. Instead of the electrons forming three stationary C==C bonds, they form a delocalized ring which gives benzene greater stability, and this is seen in the enthalpy change when breaking the delocalized ring of electrons in benzene. Comparing the structures of benzene and 1, 3, 5-cyclohexatriene: One would expect to have similar enthalpy changes for breaking the delocalized ring of benzene and the 1, 3, 5 pi bonds of the 1, 3, 5-cyclohexatriene, but in real life it is around 150 kJ/mol in... [tags: chemistry, electrons]
1039 words (3 pages)
- Background: Hydraulic fracturing also known as fracking is a technique in which rock is fractured by a pressurized liquid. The process involves the high-pressure injection of “fracking fluid” into a wellbore to create cracks in the deep-rock formations through which natural gas, petroleum, and brine will flow more freely. When the hydraulic pressure is removed from the well, small grains of hydraulic fracturing proppants, either sand or aluminum oxide, hold the fractures open. Since the invention of fracking, in 1947, there have been over 2.5 million fracking wells created across the world with over a million of them being located in the United States.... [tags: Oxygen, Metabolism, Benzene, DNA]
1288 words (3.7 pages)
- In this experiment, the goal is to separate naphthalene and benzoic acid from one gram of a crude mixture containing them both, using extraction. A general requirement of a solvent in extraction is solvating one of the pure compounds in solution but not the other. Position in the separatory funnel is determined by density of each layer. The denser layer will be on the bottom of the separatory funnel while the less dense layer will be the top layer of the separatory funnel. For extraction to be used as an effective method for separation, the components of a mixture that need to be recovered must not be soluble in the same solvent.... [tags: Solvent, Solubility, Chemistry, Benzene]
1080 words (3.1 pages)
- TOLUENE HYDRODEALKYLATION PROCESS Toluene hydrodealkylation or hydrodealkylation of toluene (HDA) is a process that used to produce benzene. The reaction occurs as: Toluene + H2 Benzene + CH4 The process need toluene and hydrogen as a main reactor. Then, toluene and hydrogen are converted in a reactor packed with catalyst to produce benzene and methane. This reaction is exothermic and the operating conditions are 500 0C to 660 0C, and 20 to 60 bar of pressure. This process begins with mixing fresh toluene with a stream of recycle unreacted toluene, and the mixing is achieved in a storage tank.... [tags: reaction, benzene, catalyst]
868 words (2.5 pages)
- Extraction To obtain oils from plant materials steam distillation is typically used. Solvent extraction is also used to create a resinoid (resembling characteristics of resin). Solvent extraction is commonly used with volatile substances that may be lost with distillation. Solvent used are pentane, hexane, and mixes of solvents such as ethyl acetate and hexane which is commonly used in place of benzene (see Figure 2). Gas-Liquid Chromatography Gas-Liquid Chromatography is the process of separating complex mixtures into the components and measuring the individual components.... [tags: extraction, resinoid, benzene]
1160 words (3.3 pages)