Classical thermodynamics Definition and 16 Threads

  1. ORF

    A What is the heat capacity of water in meta-stable equilibrium?

    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...
  2. aimLow

    I Reversible / Irreversible Fundamental Equation

    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...
  3. AJSayad

    A Thermodynamics Derivative Reduction Problems

    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...
  4. Istiak

    Derive ##\dfrac{\rho_1}{\rho_2}=\dfrac{T_2}{T_1}##

    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}##...
  5. Istiak

    I Book suggestions for classical thermodynamics

    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...
  6. beefbrisket

    Assumed value of pressure during quasistatic compression

    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"...
  7. shihab-kol

    Classical Recommendation for a classical thermodynamics book

    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...
  8. K

    How is internal energy U(S,V) a function of temperature?

    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...
  9. S

    Engineering Good Resources to learn Classical Thermodynamics

    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...
  10. S

    Classical thermodynamics problem

    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...
  11. M

    Classical Thermodynamics for Statistical Mechanics

    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...
  12. O

    Constructivist Philosophy and Classical Thermodynamics

    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...
  13. M

    Can One Reservoir Drive Cyclic Work in Classical Thermodynamics?

    Classical thermodynamics Q's. Hello ! I have some conceptual problems that are confusing me, hope someone could help. Book Being used: Fundamentals of Engineering Thermodynamics. (Micheal J. Moran & Howard N. Shapiro). 1) Analytical Kelvin-Planck statement. (pg. 224) Wcycle <= 0. (...
  14. J

    Imperfections of classical thermodynamics

    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...
  15. U

    Prof teaches Statistical thermodynamics in a Classical Thermodynamics class

    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...
  16. K

    Classical thermodynamics problem.

    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...
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