Well, at the instant we place it inside, nothing will happen. But what will happen over time? Well, to answer this question, we're going to use the second law of thermodynamics, the law of entropy. So the second law of thermodynamics tells us that when given a chance to, energy will disperse to larger volume of space. So what that means is if we have localized energy that is closed in a very small localized region, and then we open up the space, that energy will disperse and spread out throughout the entire region of space. Now, because molecules carry energy, we can say the same thing about molecules.