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Practice+Final+Key Chem 107A

Practice+Final+Key Chem 107A - 1 If the following...

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1.) If the following statements are True, Place a T in the line before the statement. If False, place an F. F When heat is absorbed by the system during a process, the sign of q is negative. T A system undergoing a reversible process may be regarded as being at equilibrium. T The energy of an isolated system is constant. F When water freezes spontaneously, its entropy must increase. F The entropy of mixing two gases increases as the concentration approaches a mole fraction of 1.0. F For a spontaneous process at constant T and P , ± G ° must be negative. T The chemical potential is the same as its partial molar Gibbs energy. T For an ideal solution, μ A is smaller than μ A ° upon adding a solute B F To determine a protein's molecular weight, freezing point depression is more accurate than measuring its osmotic pressure. F The biochemist's standard state differs from a physical chemist's in that the concentration of all products and reactants is 10 -7 M . F The standard state EMF of a redox reaction ( E °) does not change with temperature. F According to Le Chatelier's principle, adding more reactant in the following reaction will help shift the equilibrium towards more product formation in a closed reaction vessel. CaCO 3 (s) ± CaO (s) + CO 2 (g) F At equilibrium, ± r G ° = 0. F Electrons travel through the salt bridge in a Daniell cell to complete the circuit.
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For questions 2 - 10, circle the correct answer. 2.) The equation below that best describes the first law of thermodynamics is: a.) ± H = C P ± T b.) ± U = C V ± T c.) ± H = ± U + P ± V d.) ± U = q + w e.) ± G = ± H - T ± S 3.) The statement below that best describes the second law of thermodynamics is: a.) The entropy of vaporization is 88 kJ K -1 mol -1 b.) Mixed second partial derivatives are independent of the order in which the derivatives are taken c.) At equilibrium, the entropy of an isolated system reaches a maximum d.) A spontaneous process is characterized by a decrease in entropy between the initial and final states e.) The entropy change between any two states of a system requires calculation along an irreversible path between two states 4.) The third law of thermodynamics
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Practice+Final+Key Chem 107A - 1 If the following...

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