A first order reaction has 2.81 s half-life at 298 K and 0.313 s half-life at...
In a first-order reaction at 300 K, the half-life is 2.50 x 104 seconds and the activation energy is 103.3 kJ/mol. What is the rate constant at 350 K? 4.78 s-1 2.79 x 10-5 s-1 6.38 x 1016 s-1 7.47 x 10-8 s-1 1.03 x 10-2 s-1
The half-life for the reaction was determined to be 2.14 × 104 s at 800 K. The value of the half-life is independent of the inital concentration of N2O present. The activation energy of the reaction is 259.00 kJ/mol. N2O(g)->N2(g)+O(g) what would be the half life at 900.10K?
Variation of the rate constant with temperature for the first-order reaction 2N2(g) + O(g) → 2N2O4(g) is given in the following table. Determine the activation energy and pre-exponential factor for the reaction. What would be the rate constant at 350 K? Temperature / K Rate Constant / s-1 273 7.87 x 103 298 3.46 x 105 318 4.98 x 106 338 4.87 x 107 What is the activation energy in kJ/mol? Do not enter the units with your answer. What...
A first order reaction has a half-life of 196 seconds at 25oC. How long (in minutes) does it take for the concentration of the reactant to drop to 3.125% of the original concentration? (it's not 16.34) The rate constant of a chemical reaction increased from 0.197 s-1 to 3.24 s-1 after raising the temperature from 20.0 oC to 60.0 oC. What is the activation energy (in kJ/mol) for this reaction? (Hint: Think about what R value to use and what...
The half-life for the reaction below was determined to be 2.14 x 10's at 800 K. The value of the half-life is independent of the inital concentration of N20 present. The activation energy of the reaction is 259.00 kJ/mol. NO(g) - Nag) +0g) 1st attempt See Periodic Table See Hint What would be the half-life at 1000.32 K?
The half-life for the reaction below was determined to be 2.14 x 104 s at 800 K. The value of the half-life is independent of the inital concentration of N20 present. The activation energy of the reaction is 226.00 kJ/mol N20(g)N2(8) +0(g) 4th attempt See Periodic Table See Hint What would be the half-life at 1050.43 K? 33.3 The half-life for the reaction below was determined to be 2.14 x 104 s at 800 K. The value of the half-life...
. (a) If a first-order reaction has an activation energy of 104.6 kJ/mol and, in the equation k = k0 exp (-Ea/RT), k0 has a value of 5×1013/s, at what temperature will the reaction have a half-life of (i) 1 h; (ii) 1 day? [Note: the value of R is 8.314 kJ/kmol·K.] (b) If the sterilization of a biomaterial was heating at 121°C for 5 min, it could only be heated at 111°C due to the failure of the heating...
For a first-order reaction, the half-life is constant. It depends only on the rate constant k k and not on the reactant concentration. It is expressed as t1/2=0.693k t 1 / 2 = 0.693 k For a second-order reaction, the half-life depends on the rate constant and the concentration of the reactant and so is expressed as t1/2=1k[A]0. A certain first-order reaction (A→products A → p r o d u c t s ) has a rate constant of 9.30×10−3...
The reaction A(aq) → B(aq) + C(aq) is a first order reaction with respect to A(aq). The half-life of A(aq) is 93.3 s at 25.0oC. Its activation energy is 21.7 kJ/mol. What is its half-life at 75.0oC?
Consider the first order reaction: A → products studied at 277 K. If the rate constant, k, is found to be 0.571 1/s, and the Arrhenius factor, A, is 1.649, what is the activation energy for the reaction?