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A chemistry exam from september 29th, 2007, for the course chemistry 331. The exam consists of multiple-choice questions and calculations related to topics such as coal gasification, photosynthesis, fractional distillation, bond energies, and the steady-state model for earth’s temperature. Students are required to answer short-answer questions and perform calculations, showing all work.
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September 29 th, 2007 Chemistry 331 50 minutes Exam 1
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t (^) res = C / F P = P 0 e -(MW x gh / RT)^ PV = nRT Efficiency < 1 – (T (^) c / T (^) h) R = 0.0821 L atm mol -1^ K-1^ OR 8.314 J mol-1^ K-
Part A : Short answer, 8 points each. Six sentences or less!
Coal gasification Making gasoline by heating higher boiling fractions in the absence of air Respiration Fluidized bed combustion The biological conversion of organic carbon to CO 2 Primary energy use Photosynthesis Reacting coal with hot steam to make methane Fractional distillation Cracking Energy obtained directly from a fuel source Endothermic Enhanced recovery
What is tar sand? How is fuel obtained from it?
Explain how gas influx into the atmosphere can be a zero-order chemical process.
Briefly describe the main elements of the steady-state model for earth’s temperature with explicit reference to the solar flux, albedo, and the wavelengths of radiation involved in the energy balance.
What factors determine how much radiative forcing a gas will introduce to the atmosphere?
Part B : Calculate this! 20 points each. Show all work.
Bond Energies