So what will happen? Well, entropy tells us that in this case, the only thing that can move, which is a solvent and the water will move and water will travel from the inside to the outside. So our cell will shrink in size and our concentration will increase in size because now we have less volume. But the same amount of solution, now the concentration on the outside will decrease because now we have the same amount, but a larger volume, a larger amount of water. And that means eventually our concentrations will equal out. So now let's define osmosis.