Maintain constant pressure, you can't go up or down, because if I were to go up, my pressure would be increasing. Baric, well bars, that'sĪ unit of pressure, so baric is talking about pressure. Whatever follows next,Īnd this one's isobaric.
Formula for workdone iso#
Whenever you see iso before something, it means constant. To a lot of processes so the math's good, they work pretty well, we talk about them a lot. And they're often a good representation and accurate approximation
These are just the four that are kind of the simplest to deal with mathematically. But there are four thermodynamic processes that are most commonly There's infinitely many ways it can take. It could take any possible range and unless you know the exact details, it's hard to say exactly There's really infinitely many ways the gas could get from Pressure's gotta go up, so maybe it does something like that. Pressure would have to go up, so I might take a path that How would I represent that? Well, volume's gotta go down, Happen to the pressure? The pressure's probably gonna go up. But just knowing theĭirection of the piston, that lets you know which Now, what happens to the pressure? You gotta know a little And if my piston goes down, I better be going to the left This is not increasing volume, so I know if my piston goes up, my volume increases, I gotta be going to the rightward in That's increasing volume, that's increasing volume. All I know is, my volumeīetter be increasing, so this is increasing volume, Then my volume's increasing and I know on my graph I'dīetter be going to the right. What about piston going up? Well, if the piston goes up, Piston going down means decreasing volume. Now, what do we do? I know if I push the pistonĭown, my volume decreases. And so we come over to here, let's say we start at So say we started with aĬertain amount of volume, right? Let's say we start with that much volume. And that would change theĪmount of pressure inside, depending on what heat isĪdded, how much work is done. So that movable piston canĬhange that amount of volume. Piston can move up or down, changing the amount of volume, right? This is the volume we're talking about, is the volume within here.
Formula for workdone full#
So what does this mean? Well, imagine you had a container full of a gas and there'sĪ movable piston on top. And this gives you a diagram of what the pressure and volumeĪre in any given instant. Now, the P stands for Pressure and the V stands for Volume. Involving the first law are what are called PV Diagrams. When doing thermodynamics especially problems
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