phys 369 09 hw 6 revised

phys 369 09 hw 6 revised - Phys. 369, Fall 2009 Homework #6...

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Phys. 369, Fall 2009 Homework #6 - revised Due: Friday, Oct. 16, beginning of class 100 points total 1. (10 points) Schroeder, problem 4.1 2. (14 points) Schroeder, problem 4.5 3. (20 points) Schroeder, problem 4.6 4. (12 points) Schroeder, problem 4.14 5. (14 points) Schroeder, problem 4.18 6. (30 points) Gasoline is composed mostly of octanes, which are CH 3 (CH 2 ) 6 CH 3 molecules. Octanes exist in a variety of different geometries (different relative arrangements of the atoms) called isomers . Iso-octane, or 2,2,4 Trimethylpentane, is one of these isomers. Iso-octane has a standard heat of formation 259 kJ/mole f H Δ= . Iso-octane is a liquid at standard temperature and pressure. a) Suppose that 2 moles of iso-octane and 25 moles of oxygen burn completely in the reaction 81 8 2 2 2 2C H +25O 16CO +18H O ( 1 ) Find the change in the energy stored in chemical bonds from this reaction. b) Suppose now that iso-octane is mixed with air, such that the ratio of iso-octane to oxygen has the stoichiometric ratio of reaction (1), and that the iso-octane is in the vapor phase. (Of course,
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This note was uploaded on 11/06/2010 for the course PHY 369 taught by Professor Staff during the Fall '08 term at University of Texas.

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phys 369 09 hw 6 revised - Phys. 369, Fall 2009 Homework #6...

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