The Antoine Equation Coefficients for Cyclohexane

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The Antoine equation coefficients for cyclohexane have to do with a shape that forms a hexagon. Find out about the Antoine equation for coefficients for cyclohexane with help from an experienced chemistry professional in this free video clip.

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Video Transcript

Hi, I'm Robin Higgins, and this is "the Antoine equation coefficients for cyclohexane." Alright, so, just a reminder, cyclohexane, is hexane, but circular, so it forms a hexagon like this. And, remember that each carbon, here, represents a carbon bondage, two hydrogen's. So, if we go all the way around, the complete structure looks like this. Alright, and so, the Antoine equation is used for determining vapor pressure, and so, the equation, itself, looks like this: P (vapor pressure) equals 10, and then you have this big exponent, over here, and it's A minus B, over C plus T. Okay, and so, this P is vapor pressure, and this T is temperature, and then A, B, and C, are the coefficients that you need. And, there's no way to make up these coefficients on your own. You just need to be given them. They're all determined from experiments that scientists did. So, they're written down here, A, B, and C. And, they're actually in two categories, the range of 7 to 81 degrees Celsius, and the range of 79 to 280 degrees Celsius. So, to solve, you just need to find the temperature that you want, plug it in, find the appropriate A, B, and C, plug those in, and you'll have your estimated vapor pressure. That's it. I'm Robin Higgins, and this is "what are the Antoine equation coefficients for cyclohexane?"


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