Concept explainers
Interpretation: Mechanism for monobromination of methane that includes initiation, propagation and termination steps should be written.The value of
Concept introduction: The monobromination performed with ultraviolet light proceeds via radical chain mechanism. Bromine transforms
It is summarized in the illustration below:
The formula to calculate
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Organic Chemistry: Structure and Function
- The rate law for addition of Br2 to an alkene is first order in Br2 and first order in the alkene. Does this information suggest that the mechanism of addition of Br2 to an alkene proceeds in the same manner as for addition of HBr? Explain.arrow_forwardCalculate the enthalpy of benzene from its enthalpy of combustion and the enthalpy of combustion of cyclohexanearrow_forwardHow does the first step in the reaction of propene with Br2 differ from the first step in the reaction of propene with HBr?arrow_forward
- 11-62(Chemical Connections 11C) What are Freons? Why were they considered ideal compounds to use as heat-transfer agents in refrigeration systems? Give structural formulas of two Freons used for this purpose.arrow_forwardHeptane, C7H16, can be catalytically reformed to make toluene, C6H5CH3, another seven-carbon molecule. How many hydrogen molecules are produced for every toluene molecule derived from heptane? Write a balanced chemical equation for this reaction. Why is it profitable to convert heptane into toluene?arrow_forwardDodecane, C12H26, is an unbranched alkane Predict the following: Will it dissolve in water? Will it dissolve in hexane? Will it burn when ignited? Is it a liquid, solid, or gas at room temperature and atmospheric pressure? Is it more or less dense than water?arrow_forward
- 11-63 (Chemical Connections 11C) In what way do Fre- ons negatively affect the environment?arrow_forwardUsing the table of bond energies estimate the heat of combustion of one mole of 2,4-dimethyl-1,3-pentadiene.arrow_forwardA) Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The combustion of one mole of ethanol releases 326.7 kcal of energy.The combustion of one mole of 2-methylhexane, C7H16, releases 1.150×103 kcal of energy. How much energy is released during the complete combustion of 495 grams of 2-methylhexane ?------------- kcalAssuming the same efficiency, would 495 grams of ethanol provide more, less, or the same amount of energy as 495 grams of 2-methylhexane? --------- B) Combustion reactions are exothermic. The heat of reaction for the combustion of 2-methylheptane, C8H18, is 1.306×103 kcal/mol. What is the heat of combustion for 2-methylheptane in kcal/gram?--------- kcal/gramHow much heat will be given off if molar quantities of 2-methylheptane react according to the following equation? 2 C8H18+25…arrow_forward
- (a) When the metallic element sodium combines with the nonmetallic element bromine, Br2(l), how can you determine the chemical formula of the product? How do you know whether the product is a solid, liquid, or gas at room temperature? Write the balanced chemical equation for the reaction. (b) When a hydrocarbon burns in air, what reactant besides the hydrocarbon is involved in the reaction? What products are formed? Write a balanced chemical equation for the combustion of benzene C6H6(l), in air.arrow_forwardDraw the structure of the organic product formed from the reaction of sodium methoxide with 1‑chloro‑4‑nitrobenzene. Be sure to show formal charges.arrow_forwardEthanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The heat of combustion of ethanol is 326.7 kcal/mol.The heat of combustion of 2-methylhexane, C7H16, is 1.150×103 kcal/mol. How much energy is released during the complete combustion of 446 grams of 2-methylhexane ??? kcalAssuming the same efficiency, would 446 grams of ethanol provide more, less, or the same amount of energy as 446 grams of 2-methylhexane?arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning