Question: Problem 6 . 1 0 ( modified ) , Henry and Heinke, Environmental Science and Engineering, 2 n d Ed . : Ethanol is accidentally

Problem 6.10(modified), Henry and Heinke, Environmental Science and Engineering, 2nd Ed.:
Ethanol is accidentally spilled into a 550,000m3 pond, where it is degraded by microbial action
according to the reaction:
C2H5OH+O2CO2+H2O
a. Balance the reaction for microbial degradation of ethanol.
b. How many kilograms of oxygen are consumed in the process if 1,850lb ethanol were
spilled?
c. How many kilograms of CO2 are produced?
d. Assume that produced CO2 remains dissolved and does not partition into the atmosphere.
What is the dissolved concentration (mgL) of CO2 in the lake?
e. Assume that the dissolved CO2 concentration found in part (d) is allowed to equilibrate with
an atmosphere that is initially free of CO2 gas. What will be the pressure of CO2 in this
atmosphere after equilibration with the dissolved CO2 in the lake?
Problem 6 . 1 0 ( modified ) , Henry and Heinke,

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