课程名称︰普通化学丙 课程性质︰必修 课程教师︰刘铭璋 开课学院：生农学院 开课系所︰生机系 园艺系 考试日期（年月日）︰2012/3/30 考试时限（分钟）：100分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.Fill the blanks in the following sentences. (20%) (a)Theoretical, (b)Arrhenius acid, (c)Avogadro's, (d)Precision,(e)molecular, (f)heat capacity, (g)Extensve, (h)Actual, (i)electrolyte (j)nonelectrolyte (k)Hydration, (l)intensive, (m)Arrhenius base, (n)Bronsted acid (o)Bronsted base, (p)specific heat, (q)empirical, (r)Exothermic (s)Endothermic, (t)Boyle's, (u)Charles's, (v)Accuracy (1)An ___ property of a material depends upon how much matter is being considered. Mass,length,and volume are this kind of properties. (2)___ tells us how close a measurement is to the true value of the quantity that was measured. (3)An ___ formula shows the simplest whole-number ratio of the atoms in a substance. (4)___ yield is the amount of product that would result if all the limiting reagent reacted. (5)An ___ is a substance that, when dissolved in water, results in a solution that can conduct electricity. (6)___ is the process in which an ion is surrounded by water molecules arranged in a specific manner. (7)A ___ is a proton acceptor. (8)The ___ of a subastance is the amount of heat required to raise the temperature of one gram of the substance by one degree Celsius. (9)___ process is a process that gives off heat from the system to the surroundings. (10)___ law states that the pressure of a fixed amount of gas maintained at constant temperature is inversely proportional to the volume of the gas. 2.Express the fraction 1/23 as a decimal to 4 significant figures. (A)0.0434 (B)0.0435 (C)0.04347 (D)0.04348 (E)0.0435. (2%) 3.Define the following units of concentration:molarity,molality,ppm,ppb. (4%) 4.Name the following compounds:(a)FeHPO4 (b) (NH4)2SO3 (c)PBr5 (d)HClO4 (e)C8H18 (5%) 5.Write the chemical formulas for the following compounds: (a)mercury(I) nitrate (b)manganese(VII) oxide (c)potassium carbonate (3%) 6.Describe the procedure for an acid-base titration. (4%) 7.Describe the differences between the ideal gas equation and van der Waals equation. (4%) 8.Define these terms:system,surroundings,isolated system, and first law of thermodynamics. (4%) 9.The depletion of ozone (O3) in the stratosphere has been a matter of great concern among scientists in recent years. It is believed that ozone can react with nitric oxide (NO) that is discharged from the high-altitude jet plane, the SST. The reaction is O3 + NO → O2 + NO2 If 0.740 g of O3 reacts with 0.670 g of NO, how many grams of NO2 will be produced? Which compound is the limiting reagent?Calculate the number of moles of the excess reagent remaining at the end of the reaction. (7%) 10.Characterize the following compounds as solube or insoluble in water: (a)PbSo4, (b)BaCO3, (c)Li3PO4, (d)NH4ClO4 (e)Mn(OH)2. (5%) 11.Assign oxidation numbers of the underlined atoms in the following compounds and ions: (a)IF7,I? (b)C2H4,C? (c)HNO2,N? (d)KO2, O? (e)P4, P? (5%) 12.Milk of magnesia is an aqueous suspension of magnesium hydroxide [Mg(OH)2] used to treat acid indigestion. Calculate the vloume of a 0.035M HCl solution needed to react with two spoonfuls of milk of magnesia [approximately 10.0 mL at 0.080 g Mg(OH)2/ml] (6%) 13.A compound of P and F was analyzed as follows: Heating 0.2324 g of the compound in a 378-cm^3 container truned all of it to gas, which had apressure of 97.3mmHg at 77*C. Then the gas was mixed with calcium chloride solution, which truned all of the F to 0.2631 g of CaF2 . Determine the molecular formula of the compound. (6%) 14.Consider the reation H2 + Cl2 → 2HCl delta H =XXX KJ/mol(sorry forget it) If 2.0 moles of H2 react with 3 moles of Cl2 to form HCl, calculate the work done against a pressure of 1.0 atm at 25*C. What is delta U for this reaction? Assume the reaction goes to completion. (4%) 15.From the following heats of composition, CH3OH(l) + 3/2O2(g) → CO2(g) + 2H2O(l) delta H = -726.4 KJ/mol C(graphite) + O2(g) → CO2(g) delta H =-393.5 KJ/mol H2(g) + 1/2O2(g) → H2O(l) delta H =-285.8 KJ/mol Calculate the enthalpy of formation of methanol(CH3OH) from its elements C(graphite) + 2H2(g) +1/2O(g) → CH3OH(l) (7%) 16.A 44.0 g sample of an unknown metal at 99.0*C was placed in a constant- pressure calorimeter containing 80.0 g of water at 24.0*C. The final temperature of the system was found to be 28.4*C. Calcuate the specific heat of the metal. (The heat capacity of calorimeter is 12.4 J/*C) (7%) 17.The combustion of what volume of ethane (C2H6), measured at 23.0*C and 752 mmHg, would be required to heat 855 g of water from 25.0*C to 98.0*C (6%) ●Swater = 4.184 J/g.*C ●delta H(CO2) = -393.5 KJ/mol, delta H(H2O) = -285.8 KJ/mol delta H(C2H6) =-84.7 KJ/mol ●Atomic mass of Mg:24.31, Ca:40.08, F:19.00 ,P:30.97 --

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