ABSTRACT
For a single-phase system, the thermodynamic state functions V, U, S, H, A, and G are all extensive and can be expressed in terms of the state variables P, T and composition. Volume is a measurable property and provides a more visual sense of the algebra. However, the treatment is general and expressions similar to Equation 4.3, but with independent variables P and T, can be written for all other extensive functions U, S, H, A, or G. Thus, for the total differential of any of the state functions, taking the volume as an example, we write https://www.w3.org/1998/Math/MathML"> d V = ( δ V δ T ) P , n d T + ( δ V δ P ) T , n d P + ∑ k c ( δ V δ n k ) T , P , n j ≠ k d n k https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315399065/5df30985-80c1-4e11-9533-10c20ed2604c/content/equ06_01.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
