A student obtained the following data for the gas phase decomposition of phosphine at 120 °C. PH₂(g) →→→→1/4 P4(g) + 3/2 H₂(g) [PH3], M 9.40x10-2 time, s 0 4.70x10-² 29.9 2.35x10-2 59.8 1.18x10-2 89.7 (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 = 29.9 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?
A student obtained the following data for the gas phase decomposition of phosphine at 120 °C. PH₂(g) →→→→1/4 P4(g) + 3/2 H₂(g) [PH3], M 9.40x10-2 time, s 0 4.70x10-² 29.9 2.35x10-2 59.8 1.18x10-2 89.7 (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 = 29.9 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?
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![A student obtained the following data for the gas phase decomposition of phosphine at 120 °C.
PH3(g) 1/4 P4(g) + 3/2 H₂(g)
9.40x10-2
[PH3], M
time, s
0
4.70x10-2
29.9
2.35x10-2 1.18x10-2
89.7
59.8
(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 = 29.9 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?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3f35a07c-a5eb-4d79-bb69-5908bd1ff29b%2Ffa6d5062-c368-4e0a-baeb-a04ecaadcffa%2Fxvlfwij_processed.png&w=3840&q=75)
Transcribed Image Text:A student obtained the following data for the gas phase decomposition of phosphine at 120 °C.
PH3(g) 1/4 P4(g) + 3/2 H₂(g)
9.40x10-2
[PH3], M
time, s
0
4.70x10-2
29.9
2.35x10-2 1.18x10-2
89.7
59.8
(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 = 29.9 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?
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