Civil and Environmental Engineering 2217A/B Lecture Notes - Lecture 3: Reaction Rate Constant, Mass Balance, Reaction Rate
16 Dec 2018
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Accumulation = mass input rate - mass output rate - reaction rate. Def: a steady state system is one in equilibrium. Condition 1: mass balance for a steady state system. 0 = mass input rate - mass output rate - reaction rate. Condition 2: mass balance for a conservative system. Accumulation = mass input rate - mass output rate - 0. Condition 3: mass balance under steady state and for a conservative system. 0 = mass input rate - mass output rate - 0 mass input rate = mass output rate m = m. In vin ain = out vout aout -> from fluids. In qin = out qout -> from fluids. Cin qin = cout qout -> from enviro. Condition 4: mass balance steady state but non-conservative pollutant decay. Non-conservative pollutants: decay -> reaction rate = -kcv. 0 = mass input rate - mass output rate - kcv. 0 =cin qin - cout qout - kcv.
