The decomposition of HI(g) (Hydrogen iodide) at 500K is followed for 500s, yielding the following data: At t=0, [HI]=1.00M; At t=125s [HI]=0.90M; At t=250s [HI]=0.81M; At t=375s [HI]=0.74M; At t=500s [HI]=0.68M. Given the reaction: HI → ²H₂ + ¹₂ In turn assuming zeroth, 1st and then 2nd order, derive how the concentration of HI will vary with time in each case. By plotting an appropriate graph for each assumed rate order determine which fits the data the best and write the rate law for the reaction at 500 K.

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Chapter1: Chemical Foundations
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Question B
The decomposition of HI(g) (Hydrogen iodide) at 500K is followed for 500s, yielding the
following data:
At t=0, [HI]=1.00M;
At t=125s [HI]=0.90M;
At t=250s [HI]=0.81M;
At t=375s [HI]=0.74M;
At t=500s [HI]=0.68M.
HI → H2 + l2
Given the reaction:
In turn assuming zeroth, 1st and then 2nd order, derive how the concentration of HI will vary
with time in each case. By plotting an appropriate graph for each assumed rate order
determine which fits the data the best and write the rate law for the reaction at 500 K.
Transcribed Image Text:Question B The decomposition of HI(g) (Hydrogen iodide) at 500K is followed for 500s, yielding the following data: At t=0, [HI]=1.00M; At t=125s [HI]=0.90M; At t=250s [HI]=0.81M; At t=375s [HI]=0.74M; At t=500s [HI]=0.68M. HI → H2 + l2 Given the reaction: In turn assuming zeroth, 1st and then 2nd order, derive how the concentration of HI will vary with time in each case. By plotting an appropriate graph for each assumed rate order determine which fits the data the best and write the rate law for the reaction at 500 K.
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