Thermodynamics Forum

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A Proof of thermodynamic stability condition
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B What would happen to perception if temperatures almost reached absolute zero?
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I Can Buoyancy Exchange Occur in a Gravity-Fed Closed Hydraulic System?
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I State equations for a thermodynamic substance/system
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A Question about F.Reif page 66 (thermal interaction of systems)
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4
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I Question about the Zeroth law of thermodynamics and Equlibrium
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I Application of the first law of thermodynamics
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I Graphical difference between adiabatic and isothermal processes.
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I Why Use Constant Volume for This Adiabatic Equation?
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I Thermodynamic temperature scale and Carnot cycle
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I Kinetic equation of gases: time between collisions instead of time of colission?
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I Statistical ensemble in phase space
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A Clear night sky radiative cooling -- How to optimize?
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I Equilibrium between objects at different temperatures?
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  • Redirect
Spec'ing the power of heater for an atypical heat exchanger problem
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A Adiabatic compression of piston and finding the velocity ratio of gas
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I How to use cold air mass flow to support supermarket cooling?
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A Why is the concept of cycles overlooked in causation models?
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I Sign convention on work done to a closed system containing gas
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I Irreversible adiabatic processes & entropy change (clarification needed)
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I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?
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18
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I Enthalpy change in a flow process
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A Can Hamson-Linde cycle liquidize N2?
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I Time for a cold volume of air to reach a higher air temperature
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B Home mobile air conditioning: Is this a contradiction to thermodynamics?
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I Obtaining this form for molar energy under virial expansion (Callen)
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I Equilibrium constant change with stoichiometric doubling (Callen)?
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5
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I How to see this form for the chemical potential of an ideal gas?
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6
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I Does Callen's Entropy Expression for a General Ideal Gas Contain an Error?
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I Effective Emission Height Calculation?
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7
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I Is low entropy found in something very hot?
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I Warm-up time for a hollow cylinder
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A Temperature and pressure change in an air vessel
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3
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A Dual gas (coupled) cyclic processes?
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I Energy balance over a methanol reformer
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4
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I Why is ##dQ = dH## still valid for chemical reaction (Callen)?
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31
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1st law of thermodynamics with chemical reaction?
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25
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I Why does Callen insist a process must be reversible here?
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8
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I How can the maximum entropy and minimum energy principles be physical?
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13
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I How to know when a reversible process between end states exists?
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12
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I Helmholtz entropy of ideal gas mixture is additive?
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3
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A Efficiency of Two Carnot Engines Operating in Series
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I Finding the difference in Helmholtz free energy using thermodynamic integration
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3
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I Clarification about Aircraft Over-Wing Fog Formation (Adiabatic)
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I Is Enthalpy a Valid Concept Despite Dimensional Mismatch?
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I Galaxy redshift and thermodynamics
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I Measuring Steam Condensate from my Steam Cleaner
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I Will Heating a Sealed Container Cause All Liquid to Convert to Vapor?
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18
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I Confusion on Callen's Maximum Work Theorem
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I Confusion about the entropy of mixing
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3
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B Opening this jar is made easier by cooling or heating?
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How does evaporation generate cooling? Swamp coolers edition
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A Does anyone know typical values of cutoff ratio in diesel engines?
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Kinetic-Potential energy of moving Ice
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B Energy seems to disappear when gas is compressed?
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I Calculating Pressure Change Filling Gas Cylinders
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I Calculating Entropy & Enthalpy: SRK, Wilson, Antoine & Clausius-Clapeyron
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B Cooling liquid in rigid container
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I Connecting the microcanonical with the (grand) canonical ensemble
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I Concept of Thermal Equilibrium in the Context of Canonical Ensemble
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I How is combustion energy released?
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A Beyond the energy equipartition, what is the uneven partitioning?
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B Gas cylinder at constant pressure being exposed to atmosphere, how?
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External Pressure vs. Internal Pressure when considering work
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I What is the calculation for value B in Penrose's entropy model?
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A Discretization of diffusion equation of a fluid in movement
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I Is there a Boltzmann distribution for a system with continuous energy?
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How Does Penrose Calculate Entropy in Cycles of Time?
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A Practical use of an overall heat transfer coefficient?
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B Does Avogadro's Law Account for Differences in Gas Density?
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I How Do You Calculate Equilibrium Conditions After Mixing Two Different Gases?
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A Average temperature in a greenhouse
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Enthalpy Explained: All You Need to Know
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I Is it a fluke that the triple point of water is almost exactly 0°C ?
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I Required kW for cooling and dehumidification + reheating
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B Conflicting definition of degree of freedom in Kinetic Theory of Gases
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I Adiabatic expansion work far exceeds isobaric of same volume, why?
2
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B Filling a bathtub (Hot water to cold water exchange)
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B Collision time interval of a gas molecule with wall of container
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I Energy and sand batteries (thermal energy storage)
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I Is the Boltzmann energy distribution an instance of energy diffusion?
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I 1D Heat Transfer Analytical Wall
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A Too much cooling air? (Power supply failures due to condensation)
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Partial Temperature of a Gas in a Mixture
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A Heat exchange in a thermal storage based on phase change materials
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I Disproving Carnot's Theorem: Is There an Error in My Thinking?
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B Compressed R134A refrigerant as a store of energy?
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5
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B How long does it take for the liquid in a 55-gallon drum to thaw?
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B Entropy change for reversible and irreversible processes
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B Heat exchange after thermal equilibrium
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I Cannot understand formula for molar heat capacities of an ideal gas
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I Time required to cool down a botte of wine
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I Heat transfer via air cooling -- which airflow direction is best?
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3
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I Confusion about the interpretation of specific volume
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I Question: To use or not to use? (heating bricks for energy storage)
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20
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B The collision of molecules during thermal expansion
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4
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I Reversible / Irreversible Fundamental Equation
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B Understanding thermodynamic equilibrium
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3
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A Thermodynamics Derivative Reduction Problems
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2
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I Is RMS speed dependent on pressure?
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5
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