The units of flux is always [mole/ cm2s or gr/cm2s ] but the units of the individual mass transfer coefficients depends on the driving force. Who can you convert from one driving force to another? Let say you are given kL (in NA=kL(cAicAL )) but you need to find kx in (in NA=kx (xAixAL)) how would you find kx kx=[]kL Multiply by concentration of A in gas Multiply by partial pressure Divide by total pressure Multiply by total concentration in gas phase Divide by concentration of A in gas Multiply by concentration of A in liquid Divide by concentration of A in liquid Divide by partial pressure Divide by total concentration in liquid Divide by total concentration in gas Multiply by total pressure Multiply by total concentration in liquid