Consider the following initial arrangement in which the membrane is only

# Consider the following initial arrangement in which

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58. Consider the following initial arrangement in which the membrane is only permeable to water. What will be the final arrangement? (A) Level B will be higher than level A, because water will flow from a region of high vapor pressure to a region of low vapor pressure. (B) Level B will be higher than level A, because water will flow from a region of low vapor pressure to a region of high vapor pressure. (C) Level A will be higher than level B, because water will flow from a region of low vapor pressure to a region of high vapor pressure. (D) Level A will be higher than level B, because water will flow from a region of high vapor pressure to a region of low vapor pressure. 59. A 0.1375 g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J / °C. The calorimeter contains exactly 1000 g of water and the temperature increases by 0.590 °C. The heat of combustion of Mg is (Note: the heat capacity of water is 4.184 J / g °C.) 60. We have a glass containing 200 grams of water at 25 °C and a supply of ice at 0 °C. The enthalpy of fusion for ice is Hfus= 6.01 kJ/mol and the specific heat of water is 4.184 J / g °C.
How many grams of ice need be added (and melted) to the glass to reduce the temperature to 0 °C? 61. For the reaction in which ozone is formed in the upper atmosphere, O2(g) + O (g) ---> O3, H= -105 kJ. ffor O3= 143 kJ. The ionization energy of O3is 1235 kJ/mol. ffor O(g) is 62. Calculate the bond energy of the B-F bond in BF3(boron trifluoride) gas. fof atomic B = 134.5 kcal/mol fof atomic F = 18.86 kcal/mol fof BF3= - 271.75 kcal/mol (A) 97.7 kcal/mol (B) 116.6 kcal/mol (C) 135.4 kcal/mol (D) 154.3 kcal/mol 63. From the following data, C(graphite) + O2(g) ---> CO2(g) H° = - 393.5 kJ H2(g) + 1/2 O2(g) ---> H2O(l) H° = -285.8 kJ 2 C2H6+ 7 O2(g) ---> 4 CO2(g) + 6 H2O(l) H° = - 3120 kJ the enthalpy of formation of C2H6(g) is (A) -6409 kJ. (B) -168 kJ. (C) -84.4 kJ. (D) 2441 kJ. 64. Which process will be accompained by a positive G° at 25 °C? (A) 2 Cl(g) ---> Cl2(g) (B) HClO4(aq) + OCl¯(aq) ---> ClO4¯(aq) + HOCl(aq) (C) 2 NaCl(l) ---> 2 Na(l) + Cl2(g)
(D) Cl2(aq) + 2 Br¯(aq) ---> 2 Cl¯(aq) + Br2(aq) 65 Given the following data Substance H° (kJ/mol) S° (J/mol K) G° (kJ/mol) FeO(s) - 266.3 57.49 - 245.12 C(graphite) 0 5.74 0 Fe(s) 0 27.28 0 CO(g) - 110.5 197.6 - 137.15 determine at what temperature the following reaction is spontaneous. FeO(s) + C(graphite) -------> Fe(s) + CO (g) (A) 298K (B) 668K (C) 966K (D) Because G° is positive, the reaction will never be spontaneous. 66. The decomposition of NO 2 NO(g) ------> N2(g) + O2(g) follows simple second order kinetics. In a particular experiment, it takes 2000 seconds for the concentration of NO to fall from 2.80 x 10¯3M. If a second experiment is perfomed with the initial concentration of NO at 0.0820 M, calculate how long it will take for the concentration to fall to 4.10 x 10¯2M.

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• Spring '08
• rogers
• Atom, Reaction, Vapor pressure, uranium oxide, atomic weight, (aq)

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