Help on these two plzeas A student obtained the following data for the decomposition of hydrogen iodide on a goldsurface at 150 °C.HI(g) 12 H₂(g) + ½ I₂(g)[HI], Mseconds0.140♥07.00×10-²5213.50×10-27811.75×10-2(1) What is the half-life for the reaction starting at t=0 s?What is the half-life for the reaction starting at t=521 s?Does the half-life increase, decrease or remain nstant as the reaction proceeds?(2) Is the reaction zero, first, or second order?911S(3) Based on these data, what is the rate constant for the reaction?SMs-1 The gas phase decomposition of nitrogen dioxide at 383 °CNO₂(g) → NO(g)+½O₂(g)is second order inNO₂ with a rate constant of 0.5401M.SIf the initial concentration ofNO2 is 0.112 M, the concentration ofNO₂ will be2.31 x 10-2 M afterseconds have passed.

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Chemistry

Help on these two plzeas

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.35PAE: 11.35 For the reaction 2 NO(g) + 2 H?(g) — N,(g) + 2 H,O(g) at 1100°C, the following data have been...

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Question

Help on these two plzeas

A student obtained the following data for the decomposition of hydrogen iodide on a gold
surface at 150 °C.
HI(g) 12 H₂(g) + ½ I₂(g)
[HI], M
seconds
0.140
♥
0
7.00×10-²
521
3.50×10-2
781
1.75×10-2
(1) What is the half-life for the reaction starting at t=0 s?
What is the half-life for the reaction starting at t=521 s?
Does the half-life increase, decrease or remain nstant as the reaction proceeds?
(2) Is the reaction zero, first, or second order?
911
S
(3) Based on these data, what is the rate constant for the reaction?
S
Ms-1

The gas phase decomposition of nitrogen dioxide at 383 °C
NO₂(g) → NO(g)+½O₂(g)
is second order in
NO₂ with a rate constant of 0.540
1
M.S
If the initial concentration of
NO2 is 0.112 M, the concentration of
NO₂ will be
2.31 x 10-2 M after
seconds have passed.

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