So the first one we have ch four gas or CCL four liquid. So within those three choices, we're gonna choose the best out of each one. So this will be we're gonna compare these two, these two and these two. We're gonna say which substance, for example, to which substance has greater mola entropy. And if entropy is decreasing, the sign of entropy will be negative. So in this direction, we're gonna say that entropy decreases because order is increasing. We haven't gotten to a solid yet, but they're sliding over one another. Now the molecules are even closer together. We have gasses which are very spaced out. So we're gonna say in this natural progression, when we go from solid liquid to gas, we're gonna say entropy or chaos will increase because the molecules get farther and farther apart and of entropy is increasing in the sign of entropy will be positive. And then as they become a gas, they become very spaced out, so they're bouncing all over the place. But because it's a liquid there, naturally sliding over each other, moving around one another. Then, as we become a liquid, the molecules air still around each other. So we're gonna say in general, as we move from a solid to a liquid toe, a gas, what's happening to the molecules of any compound? So remember, a solid all the molecules are tightly packed together on top of each other. ![]() Now let's think about this in a molecular image wise. Entropy is chaos, disorder, randomness, shiftiness, whatever you want to say, it's called, and the variable we use for entropy is s. So it goes against the second law of thermodynamics. And remember, this is the third law of thermodynamics. Always trying to get more and more disordered. So basically, everything is always gonna be in disorder. The entropy of all objects is equal to zero. On the opposite end of this, the third Law of thermodynamics says that at absolute zero, absolute zero is zero kelvin at absolute zero. This is all the second law of thermodynamics is saying now. Er, by the day, this is the natural state of the universe. ![]() So simply put, the second law says that the universe is going to shit. This is the natural process of our universe. Everything is breaking down, becoming less ordered. The universe naturally wants to go into a chaotic mode. Doesn't wanna come together in a nice little package. Now, what does this mean? This means that the universe does not want to get ordered. In all other cases the system (the gas) is restored to its initial state, but the surroundings are forever changed.Ī reversible change is one carried out in such as way that, when undone, both the system and surroundings (that is, the world) remain unchanged.Hey, guys, In this new video, we're gonna take a look at a new variable, the variable of entropy, and we're gonna see how does the entropy relate to the spontaneity of a chemical reaction? Now, what we're gonna say here is we're going to say that the second law of thermodynamics states that molecular systems tend to move spontaneously toe a state of maximum disorder or randomness. In the limit of an ”infinite” number of steps (bottom), these work terms are identical, and both the system and surroundings (the “world”) are unchanged by the expansion-compression cycle. As the number of steps increases, the processes become less irreversible that is, the difference between the work done in expansion and that required to re-compress the gas diminishes. These diagrams show the same expansion and compression ±ΔV carried out in different numbers of steps ranging from a single step at the top to an "infinite" number of steps at the bottom.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |