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?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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