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Outline:
 1.8) Place the following in order of increasing entropy at 298 K.     Ne   Xe   He   Ar   KrA) He < Ne < Ar < Kr < XeB) Ar < He < Ar < Ne < KrC) He < Kr < Ne < Ar < XeD) Ar < Ne < Xe < Kr < HeE) Xe < Kr < Ar < Ne < HeAnswer: A
演講者: 洪國明
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演講日期: 2015-06-07
上架時間: 2015-06-08
上傳者: energy4104
00:41
Outline:
 1.9) Which reaction is most likely to have a positive  Δ Ssys ?CO(g) + Cl2(g) →COCl2(g) B) SiO2(s) + 3 C(s) → SiC(s) + 2 CO(g)C) 3 NO2(g) + H2O(l) →2 HNO3(l) + NO(g) D) 6 CO2(g) + 6 H2O(g) → C6H12O6(s) + 6 O2(g)Answer: B
演講者: 洪國明
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演講日期: 2015-06-07
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上傳者: energy4104
01:23
Outline:
 1.10) The molar heat of vaporization for ethanol is 37.4 kJ/mol. If the boiling point of ethanol is 78.0°C, calculate Δ S for the vaporization of 0.500 mol ethanol, in J/K.A) 0.0535 B) 479 C) 53.5 D) 0.240 E) 107Answer: C
演講者: 洪國明
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演講日期: 2015-06-07
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上傳者: energy4104
00:51
Outline:
 1.11) Which of the following reactions will have the largest equilibrium constant (K) at 298 K?A) Fe2O3(s) + 3 CO(g) →2 Fe(s) + 3 CO2(g) ΔG° = -28.0 kJB) 2 Hg(g) + O2(g) →2 HgO(s) ΔG° = -180.8 kJC) 3 O2(g) →2 O3(g) ΔG° = +326 kJD) CaCO3(s) → CaO(s) + CO2(g) ΔG° =+131.1 kJAnswer: B
演講者: 洪國明
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演講日期: 2015-06-07
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上傳者: energy4104
00:46
Outline:
 1.12) Determine the equilibrium constant for the following reaction at 549 K. (R = 8.314 J·mol-1·K-1) CH2O(g) + 2 H2(g) →CH4(g) + H2O(g)   ΔH° = -94.9 kJ; ΔS°= -224.2 J/KA) 1.07 x 109 B) 1.94 x 10-12 C) 481 D) 2.08 x 10-3 E) 9.35 x 10-10Answer: D
演講者: 洪國明
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演講日期: 2015-06-07
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上傳者: energy4104
00:56
Outline:
 1.13) For a certain reaction, the standard free energy change is -80.0 kJ at 300 K and -40.0 kJ at 600 K. What is ΔH for this reaction, in kJ?+40 B) -80 C) -40 D) +80 E) -120Answer: E
演講者: 洪國明
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演講日期: 2015-06-07
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上傳者: energy4104
01:06
Outline:
 1.14) Assume enthalpy and entropy are not temperature dependent. For the reaction:     N2 (g) + 3 H2 (g) →2 NH3(g) Δ H° = -92.2 kJ and Kp = 6.8 × 105 at 25°C.  Calculate the value of Kp at 225°C. (R = 8.314 J·mol-1·K-1)7.8 × 10-10 2.1 × 1012 6.8 × 105 1.8 × 102 E) 2.2 × 10-1Answer: E
演講者: 洪國明
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演講日期: 2015-06-07
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01:46
Outline:
 1.15) What element is being oxidized in the following redox reaction? MnO4-(aq) + H2C2O4(aq) →Mn2+(aq) + CO2(g)A) H B) O C) C D) MnAnswer: C
演講者: 洪國明
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演講日期: 2015-06-07
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01:01
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