31. For the reaction BrO3–+ 5Br–-+ 6H+3Br2+ 3H2O at a particular time, the rate of disappearance of BrO3– -= 1.5 102M/s. What isthe rate of disappearance of Br–- at the same instant? A)13 M/sB)7.5 102M/sC)1.5 102M/sD)3.0 103M/sE)330 M/s32. Which of the following liquidswould make a good solvent for iodine, I2? 33. Consider the titration of 50.0mL of 0.212 Macetic acid solution (CH3COOH, Ka= 1.8 ×10–5at 25°C) with 0.196 MNaOH solution at 25°C. Calculate the pH of the solution after 90.0 mL of the NaOH solution hasbeen added.34. Urea (NH2CONH2), an important nitrogen fertilizer, isproduced industrially by the reaction2NH3(g) + CO2(g) NH2CONH2(aq) + H2O(l) G° = 13.6 kJat 25°CWhat isthe value of G at 25°C for thisreaction under the following set of conditions?25.0 atm NH3(g)0.500 atm CO2(g)1.00 MNH2CONH2(aq)
ID: E1035. Liquid ammonia (boiling point = –33.4C at 1 atm) can be used asa refrigerant and heat transfer fluid. How much energy isneeded to heat 25.0 g of NH3(l) from –65.0C to –12.0C at 1 atm? Use the following data:Specific heat capacity of NH3(l) 4.70 J/(g·K)Specific heat capacity of NH3(g) 2.20 J/(g·K)Heat of vaporization of NH323.5 kJ/mol 36. What isthe molecularity of the following elementary reaction?NH2Cl(aq) + OH(aq) NHCl(aq) + H2O(l) [Balanced]37. Consider the titration of 50.00 mL of 0.100 Mhydrofluoric acid (HF, Ka = 6.76 ×104) with 0.125 MNaOH. What isthe pH at the equivalence point?38. Determine the normal boiling point of ethanol (CH3CH2OH), given that itsenthalpy of vaporization is38.6 kJ/mol and itsentropy of vaporization is110 J/mol.K.A)128CB)92CC)78CD)61CE)86C39. What massof water would need to evaporate from your skin in order to dissipate 1.7 105Jof energy from your body? Use the following data to answer thisquestion.H2O(l) H2O(g) Hvap= 40.7 kJ/mol
ID: E1140. Which isthe correct equilibrium constant expression for the following reaction?Fe2O3(s) + 3H2(g) 2Fe(s) + 3H2O(g)
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- Fall '08
- Kc, Rate equation