Goddess Angel

So, What you're actually saying is, for a single inlet, single outlet steady flow device, such as a diffuser, then the mass balance simplifies to mass in is equal to mass out? And therefore the corresponding energy into the system is equal to the energy leaving the system? And furthermore, if both potential and kinetic energies can be neglected the equation simply goes to mass times enthalpy at state one is equal to mass times enthalpy at state two? Motherfucker.