chemistry

A certain first order reaction has a rate constant of 5.68 x 10–3 s–1 at 139°C and a rate constant of 8.99 x 10–1 s–1 at a temperature of 215°C.

Ea = 111 kJ mol–

q1) What is the value of the rate constant at 275°C?

q2) At what temperature does the rate constant have a value of 7.87 x 10–4 s–1?

I don't require the answer as i have it just the working out, i can't get to the answer for some reason.

  1. 👍
  2. 👎
  3. 👁
  1. Have you used the Arrhenius equation? Show your work; perhaps we can find the error.

    1. 👍
    2. 👎
  2. lnK = -Ea/R (1/T) + lnA

    lnK = -111000/8.314 (1/548.15) + lnA

    so i've tried different things however given im provided with two rate constants and two temperatures im not sure which to use and also i don't have an A value. At first i tried to input one set of data and then find A corresponding and then find K but it doesnt work.

    I tried to find A first and then find K but im not getting the right answer in the end
    which is supposed to be 18.2s.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    a first order reaction has a rate constant of 7.5 x 10^-3/s. The time required for th reaction to be 60% complete is

  2. Kinetics Problem II

    The data below were collected for the following reaction: 2NO2 (g) + F2 (g) ->2NO2F(g) A: Calculate the value of the rate constant, k. B: What is the overall order of the reaction?

  3. CHEM- KINETICS

    The rate constant for a reaction is 4.65 L mol-1s-1. The overall order of the reaction is: zero first second third I am having trouble with the order of reactions. I don't understand this question. this is an assignment question

  4. Chemistry

    The reaction of NO and O2 produces NO2. 2 NO(g) + O2(g) „_ 2 NO2(g) The reaction is second-order with respect to NO(g) and first-order with respect to O2(g). At a given temperature, the rate constant, k, equals 4.7 x 10^2

  1. Chemistry

    At a given temperature, a first-order reaction has a rate constant of 3.5 ´ 10–3 s–1. How long will it take for the reaction to be 24% complete? A chemical reaction that is first-order in X is observed to have a rate constant

  2. Chemistry

    For the reaction 2 NO (g) + Cl2 (g) → 2 NOCl (g) If the concentration of NO is tripled, the rate of the reaction increases by a factor of nine. If the concentration of Cl2 is cut in half, the rate of the reaction is decreased to

  3. chem class

    The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M):

  4. Chemistry

    A reaction is first order in A. If the rate constant of the reaction is 3.45x10^-3 s-1, what is the half life of the reaction? a. 4.98x10^-3 s b. 200 s c. 3.45x10^-3 s d. 100 s e. 1.73x10^-3 s

  1. chemistry

    Given this data in a study on how the rate of a reaction was affected by the concentration of the reactants Initial Rate, RUN #(A, M) (B, M) (C, M) (mol L-1 s-1 1 0.200 0.100 0.600 5.00 2 0.200 0.400 0.400 80.0 3 0.600 0.100 0.200

  2. chemistry

    A student performed two side-by-side reactions to test the decomposition of N2O5. The only difference between the two reactions was reactant concentration — reaction 1 started with 2 M N2O5 and reaction 2 started with 1.2 M.

  3. Chemistry

    The rate constant for a second-order reaction is 0.54 M-1s-1. What is the half-life of this reaction if the initial concentration is 0.27 M

  4. Chemistry-rate laws

    1. Determine the overall reaction order for the reaction whose rate law is as follows: rate=k[O3][ClO]: a. 0 b. 1 c. 2 *** d. 3 2. For the reaction (A→2B) whose rate law is rate=k, which of the following will change the value of

You can view more similar questions or ask a new question.