※ 引述《sparkle0829 (sparkle)》之铭言： : ...... : 98.3. Consider the following chemical reaction: 2A + 2B → C Overall reaction : Reaction mechanism: Step1. A+B→D : Step2. D+B→M : Step3. A+M→C : Which one of the following rate laws is consistent with this mechanism? : (A) Rate = k[A]^2 [B] (B) Rate = k[D][B] (C) Rate = k[A][B] : (D) Rate = k[A] [B]^2 (E) The information is not sufficient : →请问这样列是错哪? : Step3: K2 = [M]/[D][B] ; K1 = [D]/[A][B] ; [M]=K2[D][B]=K2K1[A][B]^2 : Rate[C] = K3[A][M] = K1K2K3 [A]^2 [B]^2 我认为是E，不知道哪一部是速率决定步骤~ : 98.6. Gasoline was injected into the cylinder and was ignited. A piston moved : outwardly of the cylinder while exposition took place inside the motor : engine. Which of the following statements is not accurate ? : (A) It is an example of converting chemical energy to mechanical work. : (B) The motor engine had done work to the surrounding. : (C) The temperature dropped down after the piston moved out. : (D) All the energy released from the burning of gasoline was converted : to the work done to the surrounding. : (E) It was an irreversible process. : →是否选E,不可逆表自发,但其被ignite才气体膨胀？ E是对的，答案我认为应该是D。 现实生活中几乎所有的反应在热力学夏都是不可逆的(不能回到原本的状态)。 引擎燃烧爆炸有一大部分的能量变成热能散失到surrounding， 并没有全部用来做功! : 98.10. Which of the following statements is wrong about thermodynamics ? : (A) The entropy of any substance(element or compound)in its equilibrium : state approaches zero at the absolute zero of temperature. : (B) The absolute value of the Gibbs free energy of a substance can't : be determined. : (C) The Gibbs free energy is zero during phase transitions of a pure : substance. : (D) The absolute value of the entropy of a substance can't be : determined. : (E) A spontaneous process is always an irreversible process. 我猜是C，相变化自由能会变吧! : 95.29. What is W in Boltzmann's formula, S=k x InW : (A) a fraction indicating the probability of obtaining a result : (B) a random number : (C) the number of ways of obtaining the state : (D) the work times Avogadro's number : →请问这定律是？ 应该是A， 普化课本有这个方程式，我记得~ 你可以查看看书本後面的字母索引! : 94.18. If the temperature of the reaction is decreased, what is the effect on : the equilibrium constant and ΔG ? : N2(g) + 3H2(g) → 2NH3(g),ΔH+ = -92.4 kJ/mol : (A) K increases, ΔG increases : (B) K decreases, ΔG decreases : (C) K increases, ΔG decreases : (D) K decreases, ΔG increases : (E) Temperature does not affect equilibrium or ΔG : →请问G是？1. K↑,G= -RTlnK (两个变因 T↓K↑) : 2. K↑,G= H-TS, T减少到负值，此时G↑ 故选A？ K会上升你知道， G的部分我认为这个反应在低温会趋向自发， 所以温度越低ΔG应该愈来愈小~ : 94.非选择题1. Please describe how to set up the physical structure of atom using the : experimental findings. : 题目有点多T_T 今天被教授劣退 有请各位大大帮忙了!感恩!! 抱歉~目前手边没有计算纸与笔， 也没有普化课本， 先回答你这样， 没回答的另请高手帮忙~ --

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