So if you're not sure about entropy, check out the link below. So one of the most basic definitions of entropy is that entropy is the tendency of a system to even out. For example, let's look at system. This system is composed of two sections connected by a bridge and we have two molecules on this side and eight molecules on this side. What entropy tells us is that eventually three of these molecules will end up on this side and that this system will be the most probable system. So we want a system that's even not uneven or balanced, not on balance, in which we have five molecules here and five molecules here.