Rate equation and order of a reaction.

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    THIS TUTORIAL IS AIMED AT ENABLING A STUDENT TO DETERMINE THE ORDER OF REACTING SPECIES AND TO WRITE OUT THE RATE EQUATION FROMA SET OF DATA FROM SEVERAL EXPERIMENTS. TO DETERMINE THE RATE CONSTANT AND IT UNITS.
    1. (a) Define the following terms
    (i) Reaction rate.
    (ii) Order of a reaction.
    (iii) Rate equation.
    (iv) Overall order of a reaction.
    (b) The data below were obtained for the following homogenous reaction
    2NO(g) + 2H2(g) 2H2O(g) + N2(g)
    NO(mol)
    H2(mol)
    Rate of formation of nitrogen(mol)
    5.00 x 10-4
    1.00 x 10-4
    4.5 x 10-4
    5.00 x 10-4
    2.00 x 10-4
    9.0 x 10-4
    1.00 x 10-4
    5.00 x 10-4
    0.9 x 10-4
    2.00 x 10-4
    5.00 x 10-4
    3.6 x 10-4
    If the rate equation for the reaction is given by the expression
    Rate = k
    (i) Deduce the value of x.
    (ii) Deduce the value of y.
    (iii) Calculate the value of k and give its units.
    (c) The data below was obtained for the reaction
    A + B Products
    Experiments
    Initial concentration (moldm-3)
    Rate (moldm-3s-1)
    A
    B
    1
    0.1
    0.1
    1.6 x 10-3
    2
    0.1
    0.2
    3.2 x 10-3
    3
    0.1
    0.3
    4.8 x 10-3
    4
    0.2
    0.1
    6.4 x 10-3
    5
    0.3
    0.1
    w
    (i) Determine the order of the reaction with respect to B.
    (ii) Determine the value of w in the table.
    (iii) Write the rate equation of the reaction
    (iv) Calculate the value of rate constant and give its units.

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