The gas phase decomposition of hydrogen peroxide at 400 °C H2O2(g)---> H2O(g)+ ½O2 (g) is second order in H2O2 with a rate constant of 0.650 1/Mxs . If the initial concentration of H2O2 is 0.176 M, the concentration of H2O2 will be 2.55x10^-2 M after ______  seconds have passed.

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The gas phase decomposition of hydrogen peroxide at 400 °C

H2O2(g)---> H2O(g)+ ½O2 (g)

is second order in H2O2 with a rate constant of 0.650 1/Mxs .

If the initial concentration of H2O2 is 0.176 M, the concentration of H2O2 will be 2.55x10^-2 M after ______  seconds have passed.

Expert Solution
Step 1

Given,

H2O2(g) ----> H2O(g) + 1/2O2(g)

The reaction is second order.

Rate constant (k) = 0.650 1/M.s

Initial concentration of H2O2 = [H2O2]0 = 0.176 M

Concentration of H2O2 after t sec = [H2O2]t = 2.55 × 10-2 M

Time (t) = ?

 

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