Thermodynamics Forum

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I Equilibrium between objects at different temperatures?
2
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59
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1K
I How to use cold air mass flow to support supermarket cooling?
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21
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253
A Cycles in Causal Modeling
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4
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140
I Sign convention on work done to a closed system containing gas
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5
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157
I Irreversible adiabatic processes & entropy change (clarification needed)
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22
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571
I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?
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18
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596
I Enthalpy change in a flow process
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2
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176
A Can Hamson-Linde cycle liquidize N2?
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7
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258
I Time for a cold volume of air to reach a higher air temperature
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11
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572
B Home mobile air conditioning: Is this a contradiction to thermodynamics?
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30
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627
I Focus Problem for Entropy Change in Irreversible Adiabatic Process
2
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56
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1K
I Obtaining this form for molar energy under virial expansion (Callen)
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23
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429
I Equilibrium constant change with stoichiometric doubling (Callen)?
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5
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261
I How to see this form for the chemical potential of an ideal gas?
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6
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256
I Is this an error in Callen?
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19
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352
I Effective Emission Height Calculation?
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7
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294
I Is low entropy found in something very hot?
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26
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505
I The gas work violates 2nd law of thermodynamics?
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10
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513
I Warm-up time for a hollow cylinder
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5
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341
A Temperature and pressure change in an air vessel
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3
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351
A Dual gas (coupled) cyclic processes?
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8
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418
I Energy balance over a methanol reformer
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4
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365
I Why is ##dQ = dH## still valid for chemical reaction (Callen)?
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31
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572
1st law of thermodynamics with chemical reaction?
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25
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2K
I Why does Callen insist a process must be reversible here?
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8
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343
I How can the maximum entropy and minimum energy principles be physical?
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13
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548
I How to know when a reversible process between end states exists?
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12
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500
I Helmholtz entropy of ideal gas mixture is additive?
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3
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313
A Efficiency of Two Carnot Engines Operating in Series
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9
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380
I Finding the difference in Helmholtz free energy using thermodynamic integration
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3
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345
I Clarification about Aircraft Over-Wing Fog Formation (Adiabatic)
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8
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496
I Is enthalpy a real thing?
2
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35
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1K
I Galaxy redshift and thermodynamics
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10
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1K
I Measuring Steam Condensate from my Steam Cleaner
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8
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471
I Phase change at equilibrium
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18
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491
I Confusion on Callen's Maximum Work Theorem
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7
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407
I Confusion about the entropy of mixing
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3
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416
B Opening this jar is made easier by cooling or heating?
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8
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803
How does evaporation generate cooling? Swamp coolers edition
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32
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854
A Does anyone know typical values of cutoff ratio in diesel engines?
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1
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363
Kinetic-Potential energy of moving Ice
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7
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455
B Energy seems to disappear when gas is compressed?
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3
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338
I Calculating Pressure Change Filling Gas Cylinders
2
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69
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2K
I Calculating Entropy & Enthalpy: SRK, Wilson, Antoine & Clausius-Clapeyron
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5
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697
B Cooling liquid in rigid container
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25
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585
I Connecting the microcanonical with the (grand) canonical ensemble
2
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37
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2K
I Concept of Thermal Equilibrium in the Context of Canonical Ensemble
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5
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783
I How is combustion energy released?
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24
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749
A Beyond the energy equipartition, what is the uneven partitioning?
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13
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541
B gas cylinder at constant pressure being exposed to atmosphere, how?
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8
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470
External Pressure vs. Internal Pressure when considering work
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16
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3K
I State counting (Entropy)
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20
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900
A Discretization of diffusion equation of a fluid in movement
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5
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450
I Is there a Boltzmann distribution for a system with continuous energy?
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4
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461
Entropy as State Counting
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7
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7K
A Practical use of an overall heat transfer coefficient?
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14
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539
B Ambiguity in Avogadro's Law?
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9
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602
I Mixing two different gases
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3
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695
A Average temperature in a greenhouse
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2
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474
Enthalpy Explained: All You Need to Know
2
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50
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3K
I Is it a fluke that the triple point of water is almost exactly 0°C ?
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4
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448
I Required kW for cooling and dehumidification + reheating
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11
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803
B Conflicting definition of degree of freedom in Kinetic Theory of Gases
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7
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472
I Adiabatic expansion work far exceeds isobaric of same volume, why?
3
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81
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2K
B Filling a bathtub (Hot water to cold water exchange)
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6
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965
B Collision time interval of a gas molecule with wall of container
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6
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461
I Energy and sand batteries (thermal energy storage)
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2
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475
I Is the Boltzmann energy distribution an instance of energy diffusion?
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8
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691
I 1D Heat Transfer Analytical Wall
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3
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457
A Too much cooling air? (Power supply failures due to condensation)
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1
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413
Partial Temperature of a Gas in a Mixture
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5
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9K
A Heat exchange in a thermal storage based on phase change materials
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5
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526
I Disproving Carnot's Theorem: Is There an Error in My Thinking?
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3
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515
B Compressed R134A refrigerant as a store of energy?
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5
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433
B How long does it take for the liquid in a 55-gallon drum to thaw?
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19
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887
B Entropy change for reversible and irreversible processes
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12
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645
B Heat exchange after thermal equilibrium
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2
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512
I Cannot understand formula for molar heat capacities of an ideal gas
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22
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746
I Time required to cool down a botte of wine
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22
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724
I Heat transfer via air cooling -- which airflow direction is best?
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3
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514
I Confusion about the interpretation of specific volume
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18
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1K
I Question: To use or not to use? (heating bricks for energy storage)
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20
Views
907
B The collision of molecules during thermal expansion
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4
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513
I Reversible / Irreversible Fundamental Equation
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3
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477
Tension (and Frequency) with Change in Temperature
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34
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11K
B Understanding thermodynamic equilibrium
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3
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578
A Thermodynamics Derivative Reduction Problems
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2
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536
I Is RMS speed dependent on pressure?
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5
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774
A Birch-Murnaghan equation
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3
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485
Radiation from smoke detector
2
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49
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4K
I Is this transformation irreversible?
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1
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525
I Heat capacity and work
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1
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601
A Free expansion of an ideal gas and changes in entropy
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2
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724
B The Physics of blowing a puff of air
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3
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596
I Yet again about (real) gas compression
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20
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1K
I Heating gasses in space -- How could we make a greenhouse in space?
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5
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591
I Partition function of BaTiO3
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0
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498
A Energy hypersurface in a phase space (statistical physics)
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1
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620
I Exploring Work Done in Quasi-Static & Non Quasi-Static Expansion
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2
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959
B Question regarding Heat Transfer in Carnot Engine
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1
Views
535

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