C= C HC c= нен н сн, cis-2-butene irans-2-butene 3. The half-life (t1) of the catalyzed...
The equilibrium constant, kp, equals 3.40 at 25°C for the isomerization reaction: cis-2-butene trans-2-butene. If a flask initially contains 5.00 atm of each gas, in what direction will the system shift to reach equilibrium? The system is already at equilibrium. O The system is not at equilibrium and will remain in an unequilibrated state. It will shift right. It will shift left.
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k is the rate constant in inverse seconds (s−1). a) What is the half-life of a first-order reaction with a rate constant of 4.80×10−4 s−1? b) What is the rate constant of a first-order reaction that takes 188 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. c)A certain first-order reaction has a rate constant...
The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A] to decrease by half. For example, after one half-life the concentration falls from the initial concentration [A]0 to [A]0/2, after a second half-life to [A]0/4, after a third half-life to [A]0/8, and so on. on. For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant concentration. It is expressed as t1/2=0.693k For a...
The isomerization of methylisonitrile to acetonitrile CH3NC(g) → CH3CN(g) is first order in CH3NC. The half-life of the reaction is 8.42 × 10-2 at 575 K. The rate constant when the initial [CH3NC] is 0.030 mol L-1 is ________ s-1.
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
1) 2) Suppose the surface-catalyzed hydrogenation reaction of an unsaturated hydrocarbon has a rate constant of 0.398 M/min. The reaction is observed to follow zero-order kinetics. If the initial concentration of the hydrocarbon is 6.20 M, what is the half-life of the reaction in seconds? *Please report 3 significant figures. Numbers only, no unit. No scientific notation. The equilibrium constant for the gas phase reaction 2503 (g) = 2502 (g) + O2 (g) is Keq = 2.2 x 10-9 at...
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...
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate constant. a. The rate constant of a first-order reaction is 2.43 × 10–2 min–1. What is the half-life of the reaction? (2 points) b. A first-order reaction has a rate constant of 0.547 min-1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? (2 points) c. The half-life of a first-order reaction is 5.47 min. What is the...
For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant concentration. It is expressed as 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 t 1/2 = 1 k[A ] 0 Part A A certain first-order reaction ( A→products ) has a rate constant of 9.90×10−3 s −1 at 45 ∘...
QUESTION 6 The half-life of a first-order reaction at 25,00 C is 2.00 days. What is the activation energy in J/mol if the same reaction has a rate constant of 32,242.22 s at 155.8 °C? (2 marks) (Glve answer to 3 significant figures in the form 1.23e+4 or 1.23e-4.) 2 points Save Answer -