chem

posted by .

The reaction AB(aq)->A(g)+ B(g)is second order in AB and has a rate constant of 0.0282 M^{-1} s^{-1} at 25 Celsius. A reaction vessel initially contains 250 mL of 0.105 M AB which is allowed to react to form the gaseous product. The product is collected over water at 25 Celsius.

1-How much time is required to produce 115.0 mL of the products at a barometric pressure of 779.9 mmHg. (The vapor pressure of water at this temperature is 23.8 mmHg.)

  • chem -

    I would do this.
    Use P = MRT
    where P: = (779.9-23.8)/760
    and solve for M which should give A and B concns (I assume 0.115L is the volume of the gases).
    Take 1/2 that to find M needed for AB and apply the second order equation of
    1/A - !/Ao = akt
    You know Ao, a = 1, you know k and A (from the calculation). Solve for t which should be i s since k is in s.

  • chem -

    is the answer 1392 s?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Rate Laws

    If the initial concentration of AB is 0.210 M, and the reaction mixture initially contains no products, what are the concentrations of A and B after 75 s?
  2. chemistry class

    A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) → B(g). The following data are obtained for (A) as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 …
  3. Chemistry

    Cyclopropane reacts to form propene in the gas phase. The reaction is first order in cylclopropane and has a rate constant of at 485 . If a 2.5 reaction vessel initially contains 724 of cyclopropane at 485 , how long will it take for …
  4. Chem

    Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87*10^-4 at 485degreesC. If a 2.5L reaction vessel initially contains 724 torr of cyclopropane …
  5. Chem2

    A reaction in which A, B, and C react to form products is zero order in A, one-half order in B, and second order in C. If the concentration of C is increased by a factor of 4.95 (and all other concentrations are held constant), how …
  6. chemistry

    The reaction Cl(g)+ O3(g) --> ClO(g)+ O2(g) is the first-order in both reactants. Determine the pseudo-first-order and second-order rate constants for the reaction from the data in the table below if the initial ozone concentration …
  7. HARD CHEM QUESTION

    A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <-->2H2(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: the reaction quotient initially.
  8. Chemistry

    When 0.13 g of H2 and 0.18 g of I2 are confined to a 150. mL reaction vessel and heated to 700. K, they react by a second-order process (first order in each reactant), with k = 0.063 LĀ·mol-1s-1 in the rate law (for the rate of formation …
  9. chemistry

    Dinitrogen tetroxide decomposes to form nitrogen dioxide in a second order reaction: N2O4(g)-> 2NO2(g) At 400K, the rate constant for this reaction has been measured to be 2.9x10^8 L/mol*s.suppose 0.222 mol of N2O4(g) is placed …
  10. chemistry

    The rate of a reaction A + 2B --> products is determined. When the concentration of A is 1.0 M, the rate of the reaction is 0.50 M/s. When the concentration of A is 0.50 M, the rate is 0.25 M/s. From this data, you can determine: …

More Similar Questions