MASTERING CHEMISTRY:THE CENTRAL SCIENCE
13th Edition
ISBN: 9781269712538
Author: Brown
Publisher: PEARSON
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Chapter 5, Problem 90E
The automobile fuel called E85 consists of 85% ethanol and 15% gasoline. E85 can be used in the so-called flex-fuel vehicles ( FFVs), which can use gasoline, ethanol, or a mix as fuels. Assume that gasoline consists of a mixture of octanes (different isomers of C8 H18), that the average heat of combustion of C8 H18 is 5400 kJ/mol, and that gasoline has an average density of 0.70 g/mL. The density of ethanol is 0.79 g/mL.
(a) By using the information given as well as data in Appendix C, compare the energy produced by combustion of 1.0 L of gasoline and of 1.0 L of ethanol (b) Assume that the density and heat of combustion of E85 can be obtained by using 85% of the values for ethanol and 15% of the values for gasoline. How much energy could be released the combustion of 1.0 L of E85? (c) How many gallons of E85 would be needed to provide the same energy as 10 gal of gasoline? (d) If gasoline costs $3.88 per gallon in the United States, what is the break-even price per gallon of E85 if the same amount of energy is to be delivered?
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* Hint: Think back to Chem 1 solubility rules.
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for the forward reaction? Explain. (4 pts)
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b) Changing the temperature of an exothermic reaction. (2 pts)
of
Draw TWO general chemical equation to prepare Symmetrical and non-Symmetrical ethers
Draw 1 chemical reaction of an ether
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- + C8H16O2 (Fatty acid) + 11 02 → 8 CO2 a. Which of the above are the reactants? b. Which of the above are the products? H2o CO₂ c. Which reactant is the electron donor? Futty acid d. Which reactant is the electron acceptor? e. Which of the product is now reduced? f. Which of the products is now oxidized? 02 #20 102 8 H₂O g. Where was the carbon initially in this chemical reaction and where is it now that it is finished? 2 h. Where were the electrons initially in this chemical reaction and where is it now that it is finished?arrow_forward→ Acetyl-CoA + 3NAD+ + 1FAD + 1ADP 2CO2 + CoA + 3NADH + 1FADH2 + 1ATP a. Which of the above are the reactants? b. Which of the above are the products? c. Which reactant is the electron donor? d. Which reactants are the electron acceptors? e. Which of the products are now reduced? f. Which product is now oxidized? g. Which process was used to produce the ATP? h. Where was the energy initially in this chemical reaction and where is it now that it is finished? i. Where was the carbon initially in this chemical reaction and where is it now that it is finished? j. Where were the electrons initially in this chemical reaction and where is it now that it is finished?arrow_forwardRank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. OCH 3 (Choose one) OH (Choose one) Br (Choose one) Explanation Check NO2 (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Aarrow_forward
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- Assign R or S to all the chiral centers in each compound drawn below porat bg 9 Br Brarrow_forwarddescrive the energy levels of an atom and howan electron moces between themarrow_forwardRank each set of substituents using the Cahn-Ingold-Perlog sequence rules (priority) by numbering the highest priority substituent 1.arrow_forward
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