Example: When a sample of 4-heptanone was irradiated with 313 nm radiation with a power output of 50 W under conditions of total absorption, it was found that the quantum yield 0.21. What is the number of ketone molecules dissociated down per second?

Example: When a sample of 4-heptanone was irradiated with 313 nm radiation with a power output of 50 W under conditions of total absorption, it was found that the quantum yield 0.21. What is the number of ketone molecules dissociated down per second?

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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The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the efficiency of the process. The quantum yield, ϕ, is defined as:ϕ=numberofreactioneventsnumberofphotonsabsorbed . Suppose a quantum yield for the reaction CH3X→CH3+Xis ϕ= 0.95. A cuvette containing a solution of CH3Xis irradiated with 280-nmwith a power of 885 mWfor 10.0 minutes. Part A Assuming total absorption of the light by the sample, what is the maximum amount (in moles) of CH3Xthat breaks apart?Express your answer to two significant figures. nothingmolCH3Xm o l C H 3 X actual
Homework (1): When a sample of 4-heptanone was irradiated for 150 s with 315nm radiation with a power output of 60 W under conditions of total absorption, it was found that 3.8 mmol C;H, was formed. What is the quantum yield for the formation of ethene?
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Homework (1): When a sample of 4-heptanone was irradiated for 150 s with 315nm radiation with a power output of 60 W under conditions of total absorption, it was found that 3.8 mmol CHa was formed. What is the quantum yield for the formation of ethene?
o [Template] Ph... -> Homework (1): When a sample of 4-heptanone was irradiated for 150 s with 315nm radiation with a power output of 60 W under conditions of total absorption, it was found that 3.8 mmol C2H4 was formed. What is the quantum yield for the formation of ethene? II
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