線上:25
演講網 | 使用者 | 登入   進階
1032第一次化學會考考題影音詳解  
格狀顯示
清單顯示
Outline:
 1.1) In the reaction C4H9Cl(aq) + H2O(l) → C4H9OH(aq) + HCl(aq) the concentration of the reactant changes from 0.0562 M to 0.0431 M in 85 sec. What is the average rate of decomposition over this interval?A) 1.54 × 10-4 M/sB) 0.0154 MC) 1.54 × 10-4 moles/sD) 1.54 × 10-4 molesE) 0.0154 M/sAns:A
演講者: 洪國明
觀看 (658), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:36
Outline:
 1.2) Which of the following statements is incorrect?A) The slowest step of a mechanism controls the overall rate of the reaction.B) The concentration of species involved in the mechanism after the slow step will not affect the reaction rate.C) The sum of the elementary steps in a mechanism gives the net overall reaction.D) The rate equation for an elementary step contains the reactants raised to the exponent which is the coefficient of that species.E) The rate equation for a reaction contains all the species in the balanced overall equation.Ans:E
演講者: 洪國明
觀看 (486), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:38
Outline:
 1.3) Initial rate data were obtained for the following reaction:2 A (g) + 3 B (g) → 2 C (g)What is the rate law for the reaction?A) rate = k [A][B]B) rate = k [A][B] 2C) rate = k [A] 2[B] 2D) rate = k [A]E) rate = k [A] 2[B]Ans:A
演講者: 洪國明
觀看 (321), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
01:24
Outline:
 1.4) This plot shows the rate of the decomposition of SO2Cl2 into SO2 and Cl2 as a function of the concentration of SO2Cl2 . What is the order of the reaction ?A) first orderB) zero orderC) second orderD) Order cannot be determined without more information.Ans:A
演講者: 洪國明
觀看 (438), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:40
Outline:
 1.Slide 5
演講者: 洪國明
觀看 (362), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:27
Outline:
 1.6) If a reaction has a rate equation of rate = k[A][B][C] then it is:A) overall third orderB) zero order in AC) overall first orderD) overall second orderE) second order in BAns:A
演講者: 洪國明
觀看 (284), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:44
Outline:
 1.7) The rate of a specific chemical reaction is independent of the concentrations of the reactants. Thus the reaction is:A) second orderB) first order in AC) first order in the productD) catalyzedE) overall zero orderAns:E
演講者: 洪國明
觀看 (265), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:24
Outline:
 1.8) If increasing the concentration of A in a chemical reaction causes no increase in the rate of the reaction, then we may say:A) the reaction rate is zero order in AB) A is not involved in the reactionC) the reaction rate is first order in [A]D) the reaction rate is zero order in [A]E) A is a catalystAns:D
演講者: 洪國明
觀看 (255), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:32
Outline:
 1.9) The reaction A + B →C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?A) 3.4 × 10-3 M min-1B) 1.3 M min-1C) 5 × 10-4 M min-1D) 1.9 × 10-4 M min-1E) 1.5 × 10-3 M min-1Ans:D
演講者: 洪國明
觀看 (240), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:54
Outline:
 1.10) Calculate rate constant k for a first order reaction with a half-life of 75.0 min.A) 2.67 × 10-2 min-1B) 1.54 × 10-4 min-1C) 1.33 × 10-2 min-1D) 9.24 × 10-3 min-1E) 52.0 min-1Ans:D
演講者: 洪國明
觀看 (280), 討論 (0)
演講日期: 2015-04-11
上架時間: 2015-04-16
上傳者: energy4104
00:34
Prev12Next