Latex ... best answer on this forum today .. he he.
Yeah density plays an important part so yeah in a glass pour the alcohol first.
Ever considered a mixing tank before the truck loaders; you can generate vortex using baffles in the tank and/or an agitator if a batch process???
to add to the...
Because your assumption here is Ideal gas conditions. PV=nRT so your V% should go along with the n% as long as your not close to the critical point or phase changes as previously point out.
So as a rule you can't apply this on liquid chromatograph readings. Adding Compressibility factors can...
P&IDs don't normally have splitters and mixer, they have directional arrows. However PFDs do sometimes, you can probably install Visio or DIA to check on the shape, or search for stencils shapes for visio.
I agree with dcasto, get enthalpies for 2 streams and minimize the delta H to zero while keeping the pressure constant at the desired discharge pressure.