CO2 Pressure Formula: Determine Pressure at Any Temperature

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To determine the pressure in a CO2 bottle while liquid is present, the formula proposed is p = 4.51Te, where p represents pressure in psi, 4.51 is a constant, T is the temperature in Fahrenheit, and e is an unknown variable possibly related to expansion rate. The discussion seeks clarification on calculating vapor pressure specifically for CO2. It references the Clausius-Clapeyron relation as a potential resource for understanding vapor pressure calculations. Participants are encouraged to provide insights or alternative formulas for accurate pressure determination at varying temperatures. The conversation highlights the need for precise methods in calculating CO2 pressure for practical applications.
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I'm trying to figure a formula to determine what the pressure is in a CO2 bottle, while the liquid is still present. I am familiar with a CO2 Dynamics chart, but would like to know what the pressure would be at any temperature.

So far, what I have found through numerous hours of searching and calculating is this:

p = 4.51Te
where p is the pressure in psi
4.51 is a math constant
T is the temperature in Fahrenheit
and e is unknown (I believe it to be the expansion rate relative to the temperature but am not sure).

Any help would be appreciated

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What I was asking above was vapor pressure. Can anyone help with a formula to calculate the vapor pressure in CO2 (or anything for that matter)?
 
Google Clausius-Clapeyron relation.
 

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