A student obtained the following data for the decomposition of ammonia on a tungsten surface at 1100 °C. NH3(g) →→→→1/2 N₂(g) + 3/2 H₂(g) [NH3], M 9.21x10-3 seconds 0 4.61x10-3 441 2.31x10-3 661 1.16x10-3 (3) Based on these data, what is the rate constant for the reaction? 771 (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=441 s? Does the half-life increase, decrease or remain constant as the reaction proceeds? (2) is the reaction zero, first, or second order? [ Ms-1

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A student obtained the following data for the decomposition of ammonia on a tungsten surface at 1100 °C.
NH3(g)→→→→→→→1/2 N₂(g) + 3/2 H₂(g)
9.21x10-3
[NH3], M
seconds
10
4.61x10-3
441
2.31x10-3
661
(1) What is the half-life for the reaction starting at t=0 s?
1.16x10-3
771
What is the half-life for the reaction starting at t=441 s?
Does the half-life increase, decrease or remain constant as the reaction proceeds?
(2) Is the reaction zero, first, or second order? [
(3) Based on these data, what is the rate constant for the reaction?
Ms-1
Transcribed Image Text:A student obtained the following data for the decomposition of ammonia on a tungsten surface at 1100 °C. NH3(g)→→→→→→→1/2 N₂(g) + 3/2 H₂(g) 9.21x10-3 [NH3], M seconds 10 4.61x10-3 441 2.31x10-3 661 (1) What is the half-life for the reaction starting at t=0 s? 1.16x10-3 771 What is the half-life for the reaction starting at t=441 s? Does the half-life increase, decrease or remain constant as the reaction proceeds? (2) Is the reaction zero, first, or second order? [ (3) Based on these data, what is the rate constant for the reaction? Ms-1
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