What if I increase the number of moles to six moles? What will happen to my volume? Well, suppose I take a balloon and I put a liter of water into my balloon, it's going to fill up to a certain volume. Suppose I put one more liter of water into my balloon. Well, it's going to take up twice as much volume because we're assuming, of course, that temperature and pressure is the same. So our Law of Evangels Law becomes the following this law holds for two sets of different conditions under which temperature and pressure is held the same.