Thermodynamic Definition and 459 Threads

  1. K

    What are some common misconceptions in thermodynamics?

    Sorry for some many questions here. I'm stuck on all of these problems and it's starting to really frustrate me. I'm not sure what more to do. 1. A sample of Helium behaves as an ideal gas as energy is added by heat at constant pressure from 273 K to 403 K. If the gas does 20.0 J of work...
  2. J

    Question about quantum statistical mechanics and thermodynamic arrow of time

    I got into a discussion about the "arrow of time" recently, and one point I brought up is that for a system governed by time-symmetric laws, if you place no special restrictions on the initial conditions but instead pick an initial state randomly from the system's entire phase space, you will be...
  3. F

    How Does Helmholtz Free Energy Determine Maximum Work in a Thermodynamic System?

    Let’s say we have a 1 mol system in a state A (Pa,Va,Ta are given) and we take it to a state B(Pb,Vb are given) . We want to know what’s the maximum work we can give to a reversible work source. Considering the process is carried out attached to a 150 K heat source, the only data available is...
  4. F

    Help with thermodynamic potentials

    Dear friends, I’m having trouble with this thermodynamic problem. I apologise if you don’t understand my poor English (I’m writing to you from Spain!) We’ve got two cylinders (1 is adiabatically isolated from 2 but not from the outside, where Pressure P and Tº are constant) and cylinder 1...
  5. F

    How Do Thermodynamic Potentials Apply in a Two-Cylinder System with a Heat Pump?

    Dear friends, I’m having trouble with this thermodynamic problem. I apologise if you don’t understand my poor English (I’m writing to you from Spain!) We’ve got two cylinders (1 is adiabatically isolated from 2 but not from the outside, where Pressure P and Tº are constant) and cylinder 1...
  6. I

    Einstein energy and thermodynamic energy

    Thermodynamics textbooks indicates that the total energy of a system E is given by the following equation E = U + Ek +Ep where U is the internal energy due to atomic or molecular interactions, Ek is the kinetic energy due to the velocity of the system ,and Ep is the potential...
  7. P

    What structural changes occur during graphite to diamond conversion?

    Determine the thermodynamic equilibrium constant of the following reaction to explain why graphite is not an easily converted, inexpensive source of diamond at 90 F… C(graphite) = C(diamond). Given this evidence, need diamond owners worry about disintegration of their diamond jewelry to...
  8. S

    Is the Thermodynamics of Coffee Affected by Cream and Sugar?

    I'm doing a physics portion of an International Baccalaureate (IB) Group IV project. I'm supposed to prepare a short presentation of the thermodynamics of coffee, and I need things to talk about. IDeas I have so far: -heat dissipation, with and without the cardboard ring, of a cup of...
  9. M

    How Does Gravity Influence Thermonuclear Reactions?

    i have been wondering... 1)how does gravity induce a thermodynamic reaction (specifically) 2)can the behavior of gravitons be predicted or are they virtual particlely (specifically: can they be controlled in the same way other sub-atomic particles can such as the...
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