山东大学 Physica| Chemistry(2)课程试卷 2020-2021学年 ()[4 points] Determine the rate law of the reaction; (2)[4 points Suggest the possible mechanism; A2+B→→→Lrd.s (3)[2 points] Please give explanation to the different part in desorption isotherm. In P- 2o M Evaporation of water from hydrophilic micropore is difficult (3)[4 points] Verify the proposed mechanism. (4)[2 points] If water vapor can be treated as ideal gas, and the diameter of water molecule is dI 0. 4 nm. calculate the mass specific area of this adsorbent in m'g. 18.0×1024×6022×1023×3.1416×0.04×1018mlg=60.75mg 分■人 (5)14 points] Please calculate the radius of the micropores in the adsorbent and their total volume T. Calculation(Totally 30 points 7194×103x18 14-11[18 points] At 298 K, a 1.00 mol kg" NaCl solution with mean activity coefficient aa 688.314×2982×0997× 0.658 was electrolyzed with a 1.00 cm-Ii serving as the anode and a 1.00 cm Fe as the r=345mm.72×103224×180.997=5.8×10m3 cathode. The distance between the anode and cathode is 2.00 cm. The electric conductivity [3-2][12 points] For a gaseous reaction 2A+2B-L+M taking place in a container with of the solution is 0. 10 S cm. Upon passage of a 0.10 A current, the polariz temperature and volume, its rate law has evolution on the Ti electrode is negligible while the polarization of Hz on Fe obeys Tafel 14△=kpp equation of n-a+blog[J/A cm- where a is 0.73 V, b is 0.11 V. (1)(4 points] Calculate the resistance polarization(R)of the cell; The experimental results are listed in the Table A,=P,0 (2)[2 points] Determine the electrochemical (or activation) polarization of hydrogen 2/s pAokPa ro/kPa s-l electrode(n): n=0.62 V (3)[2 points] The reversible electrolysis voltage of this Nacl solution is 1,782 V. Then, what is the effective decomposition voltage of 1.00 mol kg- NaCl(Vett) ro is the initial rate er=1.782+0.62+2.0=44V 页共3页2020-2021 学年 Fall 学期 (3) [2 points] Please give explanation to the different part in desorption isotherm. Evaporation of water from hydrophilic micropore is difficult (4) [2 points] If water vapor can be treated as ideal gas, and the diameter of water molecule is 0.4 nm. calculate the mass specific area of this adsorbent in m2g -1 . 18.010-3 /22.4 ×6.022×1023×3.1416×0.04×10-18 m2 /1 g = 60.75 m2 /g (5) [4 points] Please calculate the radius of the micropores in the adsorbent and their total volume. r=3.45 nm. 7.2×10 -3 /22.4 ×18 /0.997 = 5.8×10 -9 m3 [3-2] [12 points] For a gaseous reaction 2A + 2B ⎯→ L + M taking place in a container with constant temperature and volume, its rate law has the form The experimental results are listed in the Table. pA,0= pB,0 pB,0>>pA,0 ptotal,0/kPa t1/2/s pA,0/kPa r0/kPa s-1 47.4 82 40.0 0.137 32.4 176 20.3 0.034 r0 is the initial rate. (1) [4 points] Determine the rate law of the reaction; =2; =1 (2) [4 points] Suggest the possible mechanism; 2AA2 A2+B⎯→L r.d.s L+B⎯→M (3) [4 points] Verify the proposed mechanism. ; ; 得分 阅卷人 IV. Calculation (Totally 30 points): [4-1] [18 points] At 298 K, a 1.00 mol kg-1 NaCl solution with mean activity coefficient  = 0.658 was electrolyzed with a 1.00 cm2 Ti serving as the anode and a 1.00 cm2 Fe as the cathode. The distance between the anode and cathode is 2.00 cm. The electric conductivity of the solution is 0.10 S cm-1 . Upon passage of a 0.10 A current, the polarization of Cl2 evolution on the Ti electrode is negligible while the polarization of H2 on Fe obeys Tafel equation of  =a+blog[J/A cm-2 ], where a is 0.73 V, b is 0.11 V. (1) [4 points] Calculate the resistance polarization (R) of the cell; (1) =20 , R= 2 V (2) [2 points] Determine the electrochemical (or activation) polarization of hydrogen electrode (a); a=0.62 V (3) [2 points] The reversible electrolysis voltage of this NaCl solution is 1.782 V. Then, what is the effective decomposition voltage of 1.00 mol kg-1 NaCl (Veff); Veff = 1.782 + 0.62 + 2.0 = 4.4 V 山东大学 Physical Chemistry (2) 课程试卷 学院 专业 级 学号 姓名 … … … … … … … … … … … … … … 密 … … … … … … … … … … 封 … … … … … … … … … … 线 … … … … … … … … … … … … … 第 3 页 共 3 页