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:

R_{s} = [7.716(10^{-4}) (°API)^{1.541}] – [4.561(10^{-5}) (T -460)^{1.3911}]

where:

R_{s} = 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

R_{s} = [7.716(10^{-4}) (°API)^{1.541}] – [4.561(10^{-5}) (T -460)^{1.3911}]

R_{s} = [7.716(10^{-4}) (11)^{1.541}] – [4.561(10^{-5}) (90 – 460)^{1.3911}]

R_{s} = [7.716(10^{-4}) (11)^{1.541}] – [4.561(10^{-5}) (-370)^{1.3911}]

R_{s} = [7.716(10^{-4}) (11)^{1.541}] – [4.561(10^{-5}) (NaN)]

R_{s} = [7.716(10^{-4}) (40.2518)] – [4.561(10^{-5}) (NaN)]

R_{s} = [0.03105] – [4.561(10^{-5}) (NaN)]

R_{s} = 0.03105 – NaN

R_{s} = 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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You can also try the **demo **version via https://www.nickzom.org/calculator

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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.