The gas phase reaction of hydrogen with iodine H2+I2 2 HI is first order in H2 a

Question

The gas phase reaction of hydrogen with iodine H2+I2 2 HI is first order in H2 and first order in I. Complete the rate law for this reaction in the box below. Use the form k[A]m [B]n , where '1' is understood for m, n the zero power do not appear. (don't enter 1) and concentrations taken to Rate In an experiment to determine the rate law, the ate constant was detemined to be 2.01-101"r's Using this value for the rate constant, the rate of the reaction when [H2] = 5.54-102 M and [12] 9.78 103 M would be Ms-1

Explanation / Answer

Since the reaction is first order with respect to both of the reactants, so the rate law will be given as :

Rate = k[H2] [I2]

Now putting all the values mentioned, the rate of the reaction can be determined.

It will be :

Rate = 2.01 x 10-18 x 5.54 x 10-2 x 9.78 x 10-3

= 1.1 x 10-21 Ms-1

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