CHEN 3101 Chapter Notes - Chapter 6: Heat Capacity Ratio, Gas Constant, Closed System
Document Summary
Change in entropy (symbol: s) of a system in going from one state to another is the same for all processes (internally reversible and irreversible) between these two states. Change in entropy is given by: (subscript int rev shows that the process is internally reversible) On a differential basis, the equation for entropy change becomes: Units for entropy (s): si unit: j/k (it"s more convenient to use kj/k in this book, english unit: btu/ r, for specific entropy, si unit: The value of entropy at any state y can be found from the value of entropy at reference state x where sx is the reference value of entropy at the specified reference state: Data can also be found using software interactive thermodynamics: it using simple call statements. It can also be retrieved from diagrams: temperature entropy diagram and the enthalpy entropy diagram (mollier diagram)
