So what that means is these polar water molecules will orient themselves in such a way as to interact with the phosphate groups that are pointing to the outside on the double helix DNA molecule and that will be a stabilizing interaction. So once again we see that not only do we have hydrogen bonds that exist between the bases, but we also have these hydrogen bonds that exist between our water molecules and these phosphate groups. And that will be a very stabilizing effect. And so we see that the fact that water is the solvent, the properties of water that acts as a solvent in the formation of the DNA molecule actually favorably leads to the formation of that double helix DNA. And finally let's discuss how the thermodynamics of this reaction is also favorable. So let's suppose that this is our system and everything outside this box, everything outside our system are the surroundings.