Thermodynamics Forum

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I Efficiency of cycles bounded by two isotherms
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B Static pressure inside the glass of water
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B Pressure in fluid (liquid)
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B Physically speaking, what happens in Torricelli’s experiment?
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I Feynman's Brownian Ratchet analysis
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293
I Interseasonal heat storage / sand battery insulation?
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27
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540
I An experiment against the second law of thermodynamics
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B What actually is static pressure?
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355
A I'm trying to follow the proof given in Box 5.3 of MCP (Thorne/Blandford)
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277
I Modelling Liquid Hydrogen Boil-Off Rate
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I Generate heat conduction curves at different time steps
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I Why does reversibility require equilibrium?
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B Thermal Insulation Thickness Calculations
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B Change in entropy of reversible isothermal process
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I Interesting Thermodynamics Problem deleted in PhysicsStackExchange
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I Nuclear power plant vs coal power plant efficiency
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I Trying to wrap my head around gas turbine thermodynamics
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B Ideas regarding gravity and entropy
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I How do emissivity and absorptivity affect thermal imaging results?"
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414
B I need help understanding the derivation of this 'Absolute Scale of Temperature'
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367
B Putting a wet phone in rice vs. leaving it in an open space
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B Efficient way to warm a concave body such as Pita bread
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B Are wind farms stealing the cooling capacity of the wind?
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B Describing the cooling of a room without any electrical or mechanical devices
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B Does movement affect H2O freezing temperature?
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I Effects of altitude on liquid CO2 utilization
2
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How much power does it take to heat up air?
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I Heat Conductivity with Aluminum Foil
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I Work done in cycle of a refrigerator (in Heat and Thermodynamics by Zemansky)
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405
I Measurement of heat as an interval measurement or a ratio measurement
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I Calculation of temperature changes (heating a cube in a microwave oven)
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I Area under the curve of a temperature-time graph -> energy?
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Tension (and Frequency) with Change in Temperature
2
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B How much heat energy can give out put by ionization gas?
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554
B Heat pump as a heat engine that operates in reverse
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A Work done during adiabatic expansion on piston
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I Simulating a 2-Phase Water System: Tips and Resources for Dynamic Simulation
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541
I Questions about my Understanding of Thermodynamics and Statistical Mechanics
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529
I Adiabatic cooling in this process involving liquid ammonia
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I H2O/gold solution will not boil
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A Time needed to freeze an insulated pipe
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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 still happen in a gravitational fed water system with closed hydraulic head?
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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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I Question about the Zeroth law of thermodynamics and Equlibrium
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727
I This gas work violates 2nd law of thermodynamics?
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I Application of the first law of thermodynamics
2
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I Why does an ideal gas satisfy ##(\partial U/\partial P)_T=0##?
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I Graphical difference between adiabatic and isothermal processes.
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I Adiabatic Processes: Why does this equation use constant volume and not constant pressure?
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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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29
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A Clear night sky radiative cooling -- How to optimize?
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A Combined diffusion coefficient for gas mixture
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I Equilibrium between objects at different temperatures?
3
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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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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 Focus Problem for Entropy Change in Irreversible Adiabatic Process
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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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I How to see this form for the chemical potential of an ideal gas?
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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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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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A Dual gas (coupled) cyclic processes?
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1K
I Energy balance over a methanol reformer
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I Why is ##dQ = dH## still valid for chemical reaction (Callen)?
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1st law of thermodynamics with chemical reaction?
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I Why does Callen insist a process must be reversible here?
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I How can the maximum entropy and minimum energy principles be physical?
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I How to know when a reversible process between end states exists?
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I Helmholtz entropy of ideal gas mixture is additive?
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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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I Clarification about Aircraft Over-Wing Fog Formation (Adiabatic)
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I Is Enthalpy a Valid Concept Despite Dimensional Mismatch?
2
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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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I Confusion on Callen's Maximum Work Theorem
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I Confusion about the entropy of mixing
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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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