The gas phase decomposition of hydrogen iodide at 700 K HI(g)½ H2(g) + ½ I2(g)

Chemistry
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The gas phase decomposition of hydrogen iodide at 700 K

HI(g)½ H2(g) + ½ I2(g)

is second order in HI with a rate constant of 1.20E-3 M-1 s-1.

If the initial concentration of HI is 1.36 M, the concentration of HI will be  M after 3.34E3 seconds have passed.

Jun 2nd, 2015

Thank you for the opportunity to help you with your question!

1/[A] = kt + 1/[A]o

where k = 1.2 X 10^-3
t = 3.34 s
[A]o = initial conc = 1.36 M
[A] = conc.after 3.34 s

1/[A] = 1.2 X 10^-3 X 3.34 + 1/1.36

1/[A] = 4.74


so conc after 3.34  = 0.2109 M

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 2nd, 2015

correct can u answer this for me please!? 

The decomposition of ammonia on a platinum surface at 856 °C

NH31/2 N2 + 3/2 H2

is zero order in NH3 with a rate constant of 1.50E-6M s-1.

If the initial concentration of NH3 is 7.65E-3 M, the concentration of NH3 will be2.24E-3 M after seconds have passed.

Jun 2nd, 2015

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