Reference no: EM13774339
For the following problems involving thermodynamic data please consult the database of Robie et al. (1978), which I have uploaded to the course folder. The PDF is searchable, but not perfectly, presumably due to imperfect scanned-text recognition by the search algorithm. The easiest way to search the document is probably to go straight to the index at the end.
1. For the metamorphic reaction [grossular + quartz == anorthite + wollastonite, calculate the Gibbs free energy of reaction and the equilibrium constant at 298.15 K and at 1,000 K (1 bar total pressure). Does increasing temperature favor the formation of the assemblage grossular + quartz, or anorthite + wollastonite?
2. For the reaction converting perovskite and quartz to titanite, determine if the energetically-favored direction of the reaction at 500 K is forward (to titanite) or reverse, if the reaction is exothermic or endothermic, and what molar volume change (∂Vr) occurs during this reaction (at 500 K).
3. Calculate the de Broglie wavelength of an Ar atom moving at 500 m/s (roughly the velocity of air molecules at 25º C). How does this wavelength compare with the radius of an Ar atom?
4. For magnetite oxidation to hematite with O2, under standard conditions what partial pressure of oxygen gas in air would be buffered by this reaction, assuming no other sources of free molecular oxygen?
5. In a solution containing 0.02 mol/L Na+, 0.02 mol/L Cl-, 0.01 mol/L Ca2+, 0.02 mol/L Br-, and 0.005 mol/L Cu2+, determine the ionic strength of the solution and the activity (not concentration) of dissolved Cu2+.
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Is it endo or exothermic
: When solid sodium hydroxide is added to water, the temp increases... is it endo or exothermic?
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Justify purchasing the electronic testing device
: The Able Corporation is considering the installation of a small electronic testing device for use in conjunction with a government contract the firm has just won. Assume that Able pays 40% federal and state corporate income taxes and uses 8% after-ta..
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Effective income tax rate
: Device A costs $100000 initially, whereas devise B costs $140000. Maintenenance will be $4500 for devise A and $2750 for devise B in the first year. These maintenance costs will increase 12% per year.
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Higher level of output per worker in the steady state
: Suppose that two countries are exactly alike in every respect except that population grows at a faster rate in country A than in country B. Which country will have the higher level of output per worker in the steady state? Illustrate graphically. Whi..
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Calculate the de broglie wavelength
: Calculate the de Broglie wavelength of an Ar atom moving at 500 m/s (roughly the velocity of air molecules at 25º C). How does this wavelength compare with the radius of an Ar atom?
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Operate the equipment for the minimum
: A company has purchased equipment ( for $52000) that will reduce materials and labor costs by $12000 each year for N years. After N years, there will be no further need for the machine, and because the machine is specially designed, it will have no M..
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What can we conclude based on this correlation
: A correlation of .56 is found between class rank and student likability. What can we conclude based on this correlation?
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What is her price elasticity of demand for movie passes
: Heidi spends all her income on going to movies, regardless of her income level or the price of movie passes. What is her income elasticity of demand for movie passes? What is her price elasticity of demand for movie passes?
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What is the economic order quantity
: The UWM Bookstore orders coffee mugs out of a catalog from a supplier. The demand for these coffee mugs is 1,849 per year. There is a $45 charge for placing an order and the cost per coffee mug to hold it in inventory for the year is $2.50. What is t..
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