Question: how to get answer without temperature? -18 A shallow ponded area at a strip mine in a semiarid region is in equilibrium with underlying gypsum,

how to get answer without temperature? -18 A shallow ponded area

how to get answer without temperature?

-18 A shallow ponded area at a strip mine in a semiarid region is in equilibrium with underlying gypsum, CaSO4(s), deposits. An organic pollutant, formaldehyde (CH2O), is discharged to the pond. Biodegrada- tion of this pollutant may occur by an anaerobic reaction in which sulfate is used as an electron acceptor: SO42+2CH2O+2H3O+H2S(g)+2CO2(g)+4H2O or, if sufficient oxygen is present, by the following aerobic reaction: O2(aq)+CH2OCO2(g)+H2O with GR=518kJ/mol. A partial analysis of the system indicates the following: Ca2+=200mg/LPH2S=105.0atmPCO2=103.5atmO2(aq)=5mg/L[CH2O]=106MpH=7 Determine whether either or both of these reactions are thermodynamically feasible under the conditions stipulated. Answers: GR(aerobic)GR(anaerobic)=482kJ/mol=210kJ/mol

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