 Hello, and welcome to Physical Chemistry. This is a series of short videos that describe and introduce all the topics that are in a typical physical chemistry course. The purpose of this video in particular is to introduce you to the format that we're going to be using for these videos. So first thing to be aware of that you already have noticed is I'm using something called a light board for these videos. It's essentially just like a white board, except it's a transparent white board. I write on the board. I'll write equations and text on the board, and I can talk to you while I'm writing. If you're curious about the mechanics of the white board, there is a separate video that describes how the light board itself works. But for now, just know that I'll be treating this piece of glass like a white board as I lecture to you. A piece of advice I have for you as you watch these videos is to treat these lectures the way you would an in-person course lecture, and that's to take notes during the lecture. So I know it's going to be tempting to sit back and watch these lectures and assume you can absorb all the material, but that's not true. There's many, many, there's several hundred of these lectures. You're not going to be able to remember all the material. You're going to have to refer back to find some equations to remember some detail. And it's a lot easier to find the stuff you're looking for when you have those notes written on a piece of paper than if you have to dig back through and remember which video to find that in and find out where in the video that equation was used. So take notes the same way you would as if you were listening to me in a lecture hall. The related piece of advice is, as with any course, make sure and use the textbook. Again, you might be tempted to say you can get all the material from listening to me on these videos, and I appreciate the vote of confidence. But in fact, I'm not going to tell you all the material that's in the textbook and all the material I think you should know. I'll skip some details. I'll skip steps and a few derivations. Also, when you're reading a textbook, of course, you can go through a derivation or you can read the text, you can back up and read it as many times as you want or you can work the steps as slowly as you want. So textbook is not only a duplication of the material, but it includes some information that's not in these video lectures and vice versa. So treat the textbook as a complement to the videos and not an either or sort of thing. Doesn't matter to me what textbook you use. My class, there's a textbook, my textbook that we use for many portions of the course, but any physical chemistry textbook would be fine. Most of these topics are found in nearly any physical chemistry textbook, so many different physical chemistry textbooks should work. The important piece of advice is just make sure you keep up with the lectures and follow along in the textbook as you go along. But there are advantages to doing these lectures over video. One of those advantages that you should certainly make use of is adjusting the speed of the videos. I have had some students tell me they think I talk too slow, they wish I would talk faster, the videos kind of drag on a little too long. I've had almost an equal number of students tell me they think I talk too fast, they can't keep up, they wish I would talk more slowly so they could absorb the material. I don't plan to adjust the way I talk, mainly because the words come out of my mouth at about the speed that my brain is producing them. So I have a hard time adjusting my talking speed. The good news is you can adjust the speed that I'm talking at. There's a couple different places you could be watching this video, but if you're watching it on YouTube, there's a little gear icon, setting icon down here on the lower right. Click that icon, choose the speed you wish to watch the videos at. I think you can speed me up to twice as fast as I'm actually talking or slow me down to twice or four times as slow as I'm actually talking so you can adjust the speed to whatever makes sense for you. I'm not going to get insulted if you think I'm talking too slow and you want to speed me up. And likewise, I won't get impatient or bored if you slow me down and make me take twice as long to finish the lecture. So make sure and take advantage of that feature of the videos. Another nice thing about having these video lecturers is I can provide links to previous topics so very frequently when I'm talking about a topic and I introduce a previous topic, I'll put a link in a video that you can use as a refresher if you've forgotten the equation that I've just brought into the course or if you've forgotten the topic that I just mentioned. Those will typically show up as little cards up here in the upper right on YouTube. So you don't need to be worried if something pops up here and says suggested videos that may feel a little bit like it's an ad or feel like YouTube is trying to trick you to go away to somewhere else. With very few exceptions, every one of those suggested videos that pops up in the upper right is a link back to some previous part of the course that I've put in there myself. So for example, if I say now we're going to talk about the ideal gas law and I start talking about it, if you don't remember what the ideal gas law is and a little card pops up here that says ideal gas law, you can click on that link and it will take you back to the place in the course where we talked about the ideal gas law. So like I said, overwhelming majorities are links back to some previous part of the course. Sometimes they might be to some side topic that's not a key part of the course but there are always some additional resource for you to use to brush up on what we're mentioning in the course at that particular point. And similarly, there are videos that pop up at the end of each one of these lectures. So all of the 300 plus videos in this course have been arranged in a linear sequence. You don't have to watch them necessarily in sequence but if you watch them in the right sequence then it guarantees that no new topic is introduced before the things that it depends on. So at the end of each video I'll pop up a screen that gives you a link to the following video. So right about now in this video up pops a screen that gives you a preview of the next video in the sequence. If you want to just keep moving forward linearly in the course you can click on that preview and it will take you directly to the next video in the sequence. You don't have to watch them in that order but that's the order they're designed to be watched in. So that takes care of my brief pieces of advice for how to get the most out of this course and what the format of these lectures is going to be like. So the next step is go ahead and click on the link, the end screen that should be on the screen right now and we'll start talking about the topics that we'll talk about in BKM.