課程名稱︰普通化學丙 課程性質︰必帶 課程教師︰蔡蘊明 開課學院：生科院 開課系所︰生科系 生技系 考試日期（年月日）︰2012.10.08 考試時限（分鐘）：110分鐘 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : R = 0.08206 liter‧atm‧deg^-1‧mol^-1 = 8.3145 J‧deg^-1‧mol^-1 Molar volume of ideal gas at 298 K = 24.5 L Atomic weight: K 39.10, Br 79.90, C 12.01, H 1.008 ln(x)=(2.303)log(x) 1.Name the following compounds according to IUPAC rules (a)KIO4 (b)N2O4 (c)FeBr3 (d)MgO (e)SnO2 2.Write the formula for each of the following compounds: (a)Cuprous chloride (b)Mercuric chloride (c)Nitrous acid (d)Sodium nitrite (e)Ammonium sulfite 3.A coffee-cup calormeter initially contain 125 g water at 24.2 ℃. Potassium bromide (10.5 g), also at 24.2 ℃, is add to the water, and after the KBr dissolves, the final temperature is 21.1 ℃. Calculate the enthalpy change for dissolving the salt in KJ/mol. Assume that the specific heat capacity of the solution is 4.18 J/℃‧g and that no heat is transferred to the surrounding or to the water. 4.An expanding gas absorbs 1.55 J of heat. If its internal energy increases by 1.32 KJ, does the system do work on its surroundings or have work done on it? What the quantity of work is involved? 5.The heat capacity of a bomb calorimeter was detemined by burning 6.79 g methane (energy of combustion = -802 KJ/mol CH4) in the bomb. The temperature changed by 10.8 ℃. (a)A 12.6 g sample of acetylene, C2H2, produced a temperature increase of 16.9 ℃ in the same calorimeter. What is the energy of combustion of acetylene (in kJ/mol)? (b)Calculate the standard enthalpy of combustion of acetylene (in kJ/mol) 6.Given the following data o Fe2O3(s) + 3CO2(g) -> 2Fe(s) + 3CO2(g) ΔH = -23 kJ o 3Fe2O3(s) + CO(g) -> 2Fe3O4 + CO2(g) ΔH = -39 kJ o Fe3O4 + CO(g) -> Fe(s) + CO2(g) ΔH = +18 kJ o calculate ΔH = for the following reaction: FeO(s) + CO(s) -> Fe(s) + CO2(g) 7.For the reaction at 298 K, 2NO2(g) <-> N2O4(g) o o The value of ΔH and ΔS are -58.03 kJ and -176.6 J/K, respectively. o What is the value of ΔG at 298 K? Calculate the equilibrium constant of this reaction at 298 K. 8.Consider the following reaction: N2(g) + 3H2(g) <-> 2NH3(g) Calculous ΔG for this reaction under the following condition (assume an uncertainty of ±1 in all quanties given): T = 298 K, P(N2) = 600 atm, P(NH3) = 200 atm o o o (ΔHf(NH3) = -46 kJmol^-1, S(NH3) = 193 JK^-1mol^-1,S(N2) = 192 JK^-1mol^-1, o S(H2) = 131 JK^-1mol^-1) 9.For ammonia(NH3), the enthalpy of fusion is 5.65 kJ/mor and entropy of fusion is 28.9J/K‧mol. What is the melting point of ammonia. 10.The equilibrium constant for a certain reaction decreases from 8.84 to 3.25 * 10^-2 when the temperature increases from 25 ℃ tp 75 ℃. Estimate o the temperature where K = 1.00 for this reaction. Estimate the value of ΔH o and ΔS for this reaction. 11.State the second law of thermodynamics. 12.The solubility of oxygen in water decreases as the temperature increases. Explain this phenomenon based on free energy. 13.The potassium ion concentration in blood plasma is about 5.0 * 10^-3 M, whereas the concentration in muscle-cell fluid is much greater, 0.15 M. The plasma and intracellular fluid are separated by the cell membrane, which we assume is permeable only to K+. (a)Use an equation to express this process. (b)What would be the equilibrium condition and the corresponding free energy change? (c)What is ΔG for the transfer of 1 mol of K+ from blood plasma to the cellular fluid at body temperature, 37℃? (d)What is the minimum amout of work that must be used to transfer this K+? -- 期待著彩虹，所以開了窗， 窗外只有灼熱閃光。 所謂的彩虹，不過就是光， 只要心還透明，就能折射希望。 <<五月天 我心中尚未崩壞的地方>> --

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