How to Calculate and Solve for Entropy of Evaporation | Enthalpy
Last Updated on June 28, 2022
The entropy of evaporation is illustrated by the image below.
To compute for entropy of evaporation, two essential parameters are needed and these parameters are Enthalpy of Evapourisation (hfg) and Saturated Temprature (Ts).
The formula for calculating entropy of evaporation:
Sevap = hfg / Ts
Where;
Sevap = Entropy of Evapourisation
hfg = Enthalpy of Evapourisation
Ts = Saturated Temprature
Given an example;
Solve for the entropy of evaporation when the enthalpy of evapourisation is 40 and the saturated temperature is 10.
This implies that;
hfg = Enthalpy of Evapourisation = 40
Ts = Saturated Temprature = 10
Sevap = hfg / Ts
Sevap = 40 / 10
Sevap = 4
Therefore, the entropy of evapourisation is 4 J/K.
Calculating the Enthalpy of Evapourisation when the Entropy of Evapourisation and Saturated Temperature is Given.
hfg = Sevap x Ts
Where:
hfg = Enthalpy of Evapourisation
Sevap = Entropy of Evapourisation
Ts = Saturated Temprature
Let’s solve an example;
Find the enthalpy of evapourisation when the entropy of evapourisation is 20 and the saturated temperature is 10.
This implies that;
Sevap = Entropy of Evapourisation = 20
Ts = Saturated Temprature = 10
hfg = Sevap x Ts
hfg = 20 x 10
hfg = 200
Therefore, the enthalpy of evapourisation is 200 J/K.
Calculating the Saturated Temperature when the Entropy of Evapourisation and the Enthalpy of Evapourisation is Given.
Ts = hfg / Sevap
Where:
Ts = Saturated Temprature
Sevap = Entropy of Evapourisation
hfg = Enthalpy of Evapourisation
Let’s solve an example;
Find the saturated temperature when the entropy of evapourisation is 4 and the enthalpy of evapourisation is 40.
This implies that;
Sevap = Entropy of Evapourisation = 4
hfg = Enthalpy of Evapourisation = 40
Ts = hfg / Sevap
Ts = 40 / 4
Ts = 10
Therefore, the saturated temperature is 10 J/K.
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the entropy of evapourisation.
To get the answer and workings of the entropy of evapourisation using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.
Now, Click on Chemical Reaction Thermodynamics under Materials and Metallurgical
Now, Click on Enthalpy under Chemical Reaction Thermodynamics
Now, Click on Entropy of Evapourisation under Enthalpy
The screenshot below displays the page or activity to enter your values, to get the answer for the entropy of evapourisation according to the respective parameter which is the Enthalpy of Evapourisation (hfg) and Saturated Temprature (Ts).
Now, enter the values appropriately and accordingly for the parameters as required by the Enthalpy of Evapourisation (hfg) is 40 and Saturated Temprature (Ts) is 10.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the entropy of evapourisation and presents the formula, workings and steps too.