1) For a first-order reaction, after 230s, 33% of the reactants remain. Calculate the rate constant...

1) For a first-order reaction, after 230s, 33% of the reactants remain. Calculate the rate constant for the reaction.

2) A compound decomposes with a half-life of 80s and the half-life is independent of the concentration. How long does it take for the concentration to decrease to one-ninth of its initial value?

Expert Solution

queen_honey_blossom answered 1 year ago

The rate constant for a first order reaction is 0.060s-1. when the temperature is increased from...

The rate constant for a first order reaction is 0.060s-1. when the temperature is increased from 298K to 367 K , the rate constant increases to 0.18s-1. Calculate the activation energy for this reaction. Use kJ/mol for the units. The activation energy in kJ/mol equals (include the units in your answer):

a) At 25 °C the first-order rate constant for a reaction is 2.0 x 103 s-1....

a) At 25 °C the first-order rate constant for a reaction is 2.0 x 103 s-1. The activation energy is 15.0 kJ/mol. What is the value of the rate constant at 75 °C? (5 pts). b)A first-order reaction has rate constants of 4.6 x 10-2 s-1 and 8.1 x 10-2 s-1 at 0 °C and 20 °C, respectively. What is the value of the activation energy? (5 pts)

1)A reaction(A-products) is found to be first order with a rate constant of 2.97*10^-3 / min....

1)A reaction(A-products) is found to be first order with a rate constant of 2.97*10^-3 / min. What is the half life for this reaction? 2) If the reaction described in probrem 1 starts with an initial concentration of 1.00M of reactant A, What is the concentration of A after 300min? 3) What is the reaction oreder and what is the value of the rate constant? IN(H2O2) y=0.00835x-0.00493 1/H2O2 y=0.00460x-0.847 H2O2 y=-0.000264x+0.841

What is the rate constant of a first-order reaction that takes 127 seconds for the reactant...

What is the rate constant of a first-order reaction that takes 127 seconds for the reactant concentration to drop to half of its initial value?

a) A first order reaction is 28.5 % complete in 1908 minutes. Determine the rate constant,...

a) A first order reaction is 28.5 % complete in 1908 minutes. Determine the rate constant, k, for the reaction b) A first order reaction has a of 136.25 minutes. Determine how much time will be required for 39.5% of the original material to decompose. c) It took 62.43 days for 50% of a substance to decompose. If the reaction follows first order kineticsdetermine the value of the rate constant, k in s-1.

The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol...

The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol (CH3OH) and hydrochloric acid (HCl) is 3.32 × 10−10 s−1 at 25°C. Calculate the rate constant at 50.3°C if the activation energy is 116 kJ/mol.

Part A What is the half-life of a first-order reaction with a rate constant of 1.80×10−4 s−1?...

Part A What is the half-life of a first-order reaction with a rate constant of 1.80×10−4 s−1? Express your answer with the appropriate units. Part B What is the rate constant of a first-order reaction that takes 163 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. Part C A certain first-order reaction has a rate constant of 3.10×10−3 s−1. How long will it take for the reactant concentration to...

The following reaction is first order in N2O5: N2O5(g)→NO3(g)+NO2(g) The rate constant for the reaction at...

The following reaction is first order in N2O5: N2O5(g)→NO3(g)+NO2(g) The rate constant for the reaction at a certain temperature is 0.053/s. A. Calculate the rate of the reaction when [N2O5]= 5.9×10−2 M. B. What would the rate of the reaction be at the same concentration as in Part A if the reaction were second order? (Assume the same numerical value for the rate constant with the appropriate units.) C. What would the rate of the reaction be at the same...

The following reaction is first order in N2O5: N2O5(g)?NO3(g)+NO2(g) The rate constant for the reaction at...

The following reaction is first order in N2O5: N2O5(g)?NO3(g)+NO2(g) The rate constant for the reaction at a certain temperature is 0.053/s. A) Calculate the rate of the reaction when [N2O5]= 5.4

Consider a CSTR where a simple first-order reaction takes place. The rate constant depends on the...

Consider a CSTR where a simple first-order reaction takes place. The rate constant depends on the reactor temperature and can be given the Arrhenius equation. The reactor contents are cooled by a coolant that flows through a jacket around the reactor. Derive the dynamic model of the CSTR. i.e. the change of concentration of component A and the temperature of the reactor, assuming the flow rate and the inlet conditions are constant. You can use linearization technique for this coupled...

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