Design and Art

What might be the difference between design and art?  I think the difference might be that the way the art is hung is a part of the art.  It is intentional.  It is hung in a way that adds meaning to the piece.  Whether that means it's hung in a way that doesn't distract from it's meaning.  Or whether that means it's hung next to another piece that changes the conversation.  For design it's entirely different.  The way that the design pieces are hung is a part of the design.  It is intentional.  It is hung in a way that adds to the design of the piece.  For design it seems like presentation is everything.  It's behind the creation and it's behind the arrangement and the presentation.  For art it feels like the presentation is part of the unit.  It's significant because it creates a way for you to interact with the work.  In design that interaction is meant to be seamless and pleasing.  In art that interaction is meant to be meaningful.