# How to Calculate and Solve for Petrosky-Farshad Gas Solubility Parameter | The Calculator Encyclopedia

The image above represents petrosky-farshad gas solubility parameter.

To compute for the petrosky-farshad gas solubility parameter, two essential parameters are needed and these parameters are API Gravity (°API) and temperature (°Rankine) (T).

The formula for calculating the petrosky-farshad gas solubility parameter:

Rs = [7.716(10-4) (°API)1.541] – [4.561(10-5) (T -460)1.3911]

where:

Rs = Petrosky-Farshad Gas Solubility Parameter, x
°API = API Gravity
T = Temperature (°Rankine)

Let’s solve an example;
Find the petrosky-farshad gas solubility parameter with an API Gravity of 11 and a temperature of 90.

This implies that;

°API = API Gravity = 11
T = Temperature (°Rankine) = 90

Rs = [7.716(10-4) (°API)1.541] – [4.561(10-5) (T -460)1.3911]
Rs = [7.716(10-4) (11)1.541] – [4.561(10-5) (90 – 460)1.3911]
Rs = [7.716(10-4) (11)1.541] – [4.561(10-5) (-370)1.3911]
Rs = [7.716(10-4) (11)1.541] – [4.561(10-5) (NaN)]
Rs = [7.716(10-4) (40.2518)] – [4.561(10-5) (NaN)]
Rs = [0.03105] – [4.561(10-5) (NaN)]
Rs = 0.03105 – NaN
Rs = NaN

Therefore, the Petrosky-Farshad gas solubility parameter, x is NaN.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the petrosky-farshad gas solubility parameter.

To get the answer and workings of the petrosky-farshad gas solubility parameter using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

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Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Petroleum under Engineering

Now, Click on Fluid Properties under Petroleum

Now, Click on Petrosky-Farshad Gas Solubility Parameter under Fluid Properties

The screenshot below displays the page or activity to enter your values, to get the answer for the petroksy-farshad gas solubility parameter according to the respective parameters which are the API Gravity (°API) and temperature (°Rankine) (T).

Now, enter the values appropriately and accordingly for the parameters as required by the API Gravity (°API) is 11 and temperature (°Rankine) (T) is 90.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the petrosky-farshad gas solubility parameter and presents the formula, workings and steps too.