Classical thermodynamics Definition and 16 Threads

Hello! I am currently reading the second edition of Callen's Thermodynamics and an Introduction to Thermostatistics, and I have a question regarding Callen's definition of quasi-static. On page 96, Callen says: Another way of characterizing Callen's definition is that a process is quasi-static...

Dear experts, I noticed that super-heated water (liquid water with temperature above 100*C) undergoes boiling when pushed outside the meta-stable equilibrium. I was wondering, is the heat capacity of liquid water above 100*C the same as liquid water with temperature between 0*C and 100*C...

As far as I learned, the following statements should be correct (for closed systems, no chemical reactions), irrespective whether the process is reversible or irreversible (since S and V are state variables): dU=TdS−pdV dU=dQ+dW Does this imply, that the statement: dU≤TdS−pdV is wrong? This...

Hi everyone, I'm in a graduate level mechanical engineering thermodynamics class. We're working on derivative reductions using the gibbs and maxwell relations. I was wondering if anyone has any good sources of practice problems that I could use. I've looked through my textbook and there are...

I just found here(https://byjus.com/physics/relation-between-density-and-temperature/#:~:text=Density and Temperature Relationship 1 When density increases,,reduces. 4 When the temperature decrease, density increases.) that P=##rho##RT. So they just took ##\rho=\frac{n}{V}##...

I was looking for book on classical thermodynamics. I found lot of related posts in PSE but couldn't find a book which type I was expecting. I was searching for book which covers the whole thermodynamics (not QM but it's ok if there's some knowledge of Relativity), and I want some problems in...

My text (Ian Ford - Statistical physics) describes an ideal gas system in a piston being quasistatically compressed by a piston head of area A under external force f. It assumes the system has a uniform pressure p. All good so far. Then it says: "the force pA equals the applied external force f"...

Hello! I am a high school student and I would need some guidance regarding a thermodynamics book. I am reading and solving through these three: 1.Resnick,Halliday and Walker 2.University Physics- Young and Freedman 3.An introduction to mechanics-Kleppner and Kolenkow(purely for mechanics) Based...

In my chemical thermodynamics class/notes (and other references I've used) it is stated throughout that internal energy U is a function of entropy and volume , i.e. it's "natural" variables are S and V: U = U(S,V) I suspect that I must take this "axiomatically" and move on. Since U is a state...

Hi, I'm currently taking thermodynamics in second year mechanical engineering. I read previous threads on here about good textbooks, and everyone seemed to agree that Cengel's book is really good. Its the book we use in class, but at times I don't think it explains everything as fully as it...

Homework Statement (i) State the Second Law of Thermodynamics in one or other of its forms. (ii) The heat capacity per unit volume of a particular solid at low temperatures is equal to CT3; find expressions for its internal energy and entropy S per unit volume (ignoring the effects of...

Hi all, It's my first time to ask a question here I am now taking a Thermodynamics course and I have the authority to choose what topics to study in this course. My intention is to be able to study statistical mechanics afterward. So I need thermodynamics that will be useful when studying...

Can anyone tell me how a constructivist philosopher would view concepts in classical thermodynamics, say like the state variables pressure, temperature, internal energy, and entopy? I read in Wikipedia that "Constructivists maintain that scientific knowledge is constructed by scientists and...

Here is simple counter example to 2nd law of thermodynamics - converting heat into work. Everything is in vacuum, without gravity: Take a tube with interior covered with mirror. Fix two transparent separators inside and place hot gas between them. Now place two mirrors on both sides, which...

I'm just finishing up a "Classical Thermodynamics" class. Here is a list of topics we covered: Chapter 1: Ideal gas, equipartition of energy, heat and work, heat capacities, rates of processes Chapter 2: Multiplicity of an Einstein solid, of an ideal gas, of interacting systems Chapter 3...

Hm, I'm pretty much stuck on a thermodynamics problem. If you consider two identical masses of water at temperatures T1 and T2, what is the global increase in entropy after they have reached thermal equilibrium. The best I could come up with is [del]S = m*C*ln(T2/T1). The answer listed...