# Bubble Point Calculation Pdf To Excel

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Register now to chat, post, use our tools, and much more. KermMartian Site Admin Posts: This one is pretty straightforward; I found out how to do this while helping someone double-check an assignment.

Calculating bubble point and dew point can be extremely tricky by hand if you are given a fixed total pressure P instead of a fixed temperature T, as iterative methods must be used. Luckily, Excel can rapidly perform iterative analysis using the Goal Seek function.

## Monday, October 1, 2012

The other key is numeric equations for vapor pressure at a given temperature for a wide variety of substances, which can be found on wikipedia and, this person informs me, are derived from solutions and refinements to Antoine's Equation.

Simply search "substance data page " on Google, and the appropriate Wikipedia page should be the first result. For example, "Benzene data page " leads appropriately to Benzene data page. I suppose you could simply search Wikipedia, but I'm not quite up to the task. Anyway, in order to do this, you'll need to know three sets of information: 1 The constant pressure P of the mixture 2 The mole percent composition x i or y i of each component i of the mixture.

These should sum to 1. If not, something is wrong. Note that in my spreadsheet below, I called it P sat , the saturated pressure.

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Same thing. Check out the image below for how I laid out my spreadsheet.

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I'll explain how it works in a second. The P sat column the sets of equations from Wikipedia, with the T in deg-C plugged in; it returns a value in mmHg.

I got it woiking. Have your own thoughts to add to this or any other topic?

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