- 55
- 0
What is the definition of rate ##(-r_a)=-\frac{dCa}{dt}## or ##(-r_a)=-1/V\frac{dNa}{dt}## ? I think the general one is the second one and first one is for constant volume reaction system. Is the above written rate equation only valid to batch reactor? If not can we use this in a PFR or MFR? In PFR we know the rate comes out to be ##(-r_a)=-\frac{dFa}{dV}## ,can we equate ##-1/V\frac{dNa}{dt} = -\frac{dFa}{dV}## ? If not then why? Is the rate equation not valid everywhere?