State Function – Solved Examples
Problem 1: The entropy of a system increase from 69 j/k to 96 j/k during system process. Now find the entropy change for this process.
Solution:
Entropy change ( ΔS)=S final – S initial
ΔS= 96 – 69 j/k = 27 j/k
Problem 2: The initial internal energy of a system is 200 J, and the final internal energy is 350 J. Calculate the change in internal energy (ΔU) .
Solution:
Internal energy (ΔU) = Ufinal -Uinitial
ΔU=350J−200J=150J
Problem 3: Given that the enthalpy of a system changes from 450 kJ to 700 kJ during a certain process, Calculate the enthalpy change (ΔH) .
Solution:
Enthalpy (ΔH) = Hfinal -Hinitial
ΔH=700kJ−450kJ=250kJ
State Functions
State Functions are the functions that are independent of the path of the function i.e. they are concerned about the final state and not how the state is achieved. State Functions are most used in thermodynamics. In this article, we will learn the definition of state function, what are the state functions in Thermodynamics, and how they differ from path function.
Table of Content
- What are State Functions?
- Examples of State Functions in Thermodynamics
- Equation of State Function
- State Function Vs Path Function
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