Problem 3A 2,000 m3 water tower has been taken out of operation to install a chlorine monitor. When the watertower was put out of operation, its chlorine concentration was 2.0 mg/L. After ten hours, the chlorinecontent was determined to be 1.2 mg/L. Considering that the tank is a completely mixed batch reactor andthat there is a first order decay.a) Calculate the reaction decay rate in day-1.b) What mass of chlorine (in kg) must be added to the tank to raise the chlorine level back to itsoriginal concentration?

Sustainable Energy
2nd Edition
ISBN:9781337551663
Author:DUNLAP, Richard A.
Publisher:DUNLAP, Richard A.
Chapter18: Energy Storage
Section: Chapter Questions
Problem 15P
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Problem 3
A 2,000 m3 water tower has been taken out of operation to install a chlorine monitor. When the water
tower was put out of operation, its chlorine concentration was 2.0 mg/L. After ten hours, the chlorine
content was determined to be 1.2 mg/L. Considering that the tank is a completely mixed batch reactor and
that there is a first order decay.
a) Calculate the reaction decay rate in day-1.
b) What mass of chlorine (in kg) must be added to the tank to raise the chlorine level back to its
original concentration?

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