Question 19 Not yet answered Marked out of 1.00 Determine the rate constant from the concentration-time dependence (The

Post by **answerhappygod** » Sun Feb 13, 2022 8:00 am

: Question 19 Not Yet Answered Marked Out Of 1 00 Determine The Rate Constant From The Concentration Time Dependence The 1 (21.72 KiB) Viewed 57 times

: Question 19 Not Yet Answered Marked Out Of 1 00 Determine The Rate Constant From The Concentration Time Dependence The 2 (21.5 KiB) Viewed 57 times

: Question 19 Not Yet Answered Marked Out Of 1 00 Determine The Rate Constant From The Concentration Time Dependence The 3 (18.53 KiB) Viewed 57 times

: Question 19 Not Yet Answered Marked Out Of 1 00 Determine The Rate Constant From The Concentration Time Dependence The 4 (26.69 KiB) Viewed 57 times

Question 19 Not yet answered Marked out of 1.00 Determine the rate constant from the concentration-time dependence (The units for the initial rate of reaction are Mst); [A] Init. Rate 0.0200.15 0.055 0.035 0.15 0.096 0.050 0.350.75 Answer: Question 20 Not yet answered Marked out of 1.00 Consider the second-order decomposition of nitroysl chloride: 2NOCI(g) → 2NO(g) + Cl2(g) At 450 K the rate constant is 15.4 atm-is ? How much time (in s) is needed for NOCI originally at a partial pressure of 76 torr to decay to 18.0 torr? Answer:

Question 21 Not yet answered Marked out of 1.00 How much time (in s) is needed for NOCI originally at a concentration of 0.0194 M to decay to 0.0024 M? Answer: Question 22 Not yet answered Marked out of 1.00 How much time (in s) is needed for NOCI originally at a concentration of 0.0121 M to decay to 0.0012 M? Answer:

Question 23 Not yet answered Marked out of 100 The decomposition of formic acid (see below) is measured at several temperatures HCOOHG) + CO2(g) +H2(g) The temperature dependence of the first-order rate constant is: T(K) 800 kis") 0.00027 825 0.80049 850 0.00086 875 0.00143 900 0.80234 925 0.00372 Calculate the activation energy, in kamol Use all data points and do a linear regression using calculator or Excel. Do not pick 2 data points. This is less accurate and assumes all data points are equally good Answer: Question 24 Not yet answered Marloed out of 100 Calculate the pre-exponential term in s ). Answer:

Question 25 Not yet answered Marked out of 1.00 The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 235 to 292 °C? (The factor is the ratio of the rates.) Answer: Question 26 Not yet answered Marked out of 1.00 A catalyst decreases the activation energy of a particular exothermic reaction by 47 kJ/mol, to 62 kJ/mol. Assuming that the mechanism has only one step, and that the products are 63 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction? Answer: