Entropy per unit mass question (ds)

AI Thread Summary
In thermodynamics, if ds = 0, the process is reversible, indicating no entropy change. A negative change in entropy (ds < 0) raises questions about its feasibility, as it suggests a decrease in disorder, which is typically not possible in natural processes. When comparing two processes with ds1 < ds2, it can be concluded that ds1 is "more" reversible, meaning it has fewer irreversibilities. The discussion clarifies that "more reversible" refers to a process being closer to ideal conditions with minimal entropy production. Understanding these concepts is crucial for grasping the principles of thermodynamic processes.
ksle82
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I'm attempting to answer these thermodynamic quesions about entropy. It's been years since my last thermo course so knowledge is cloudy. If I'm incorrect or missiong relevant answers, please help.

a. If ds = 0, what can you say about the process?
b. If ds < 0, what can you say about the process?
c. If ds1 < ds2, what can you conclude about these processes?

A. process is reversible
B. ds<0 <----is this possible?
C. ds1 is "more" reversible than ds2
 
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a. yes
b. yes, its possible
c. yes, that's true.
 
If it's possible for the answer B, then what can I say about the process? I don't recall learning anything about ds<0.
 
What do you mean by "more" reversible? I don't understand. A process can either be reversible or irreversible. What do you mean when you say more reversible?
 
He means it has less irreversibilities.
 
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