Thermodynamics Forum

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I Efficiency of cycles bounded by two isotherms
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152
B Static pressure inside the glass of water
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16
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197
B Pressure in fluid (liquid)
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217
B Physically speaking, what happens in Torricelli’s experiment?
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14
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326
I Feynman's Brownian Ratchet analysis
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10
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354
I Interseasonal heat storage / sand battery insulation?
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27
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618
I An experiment against the second law of thermodynamics
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19
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350
B What actually is static pressure?
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11
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413
A I'm trying to follow the proof given in Box 5.3 of MCP (Thorne/Blandford)
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4
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315
I Modelling Liquid Hydrogen Boil-Off Rate
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4
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320
I Generate heat conduction curves at different time steps
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7
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305
I Why does reversibility require equilibrium?
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5
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336
B Thermal Insulation Thickness Calculations
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8
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358
B Change in entropy of reversible isothermal process
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11
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416
I Interesting Thermodynamics Problem deleted in PhysicsStackExchange
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13
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I Nuclear power plant vs coal power plant efficiency
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32
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877
I Trying to wrap my head around gas turbine thermodynamics
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5
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B Ideas regarding gravity and entropy
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4
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462
I How do emissivity and absorptivity affect thermal imaging results?"
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3
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461
B I need help understanding the derivation of this 'Absolute Scale of Temperature'
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2
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399
B Putting a wet phone in rice vs. leaving it in an open space
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1K
B Efficient way to warm a concave body such as Pita bread
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8
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463
B Are wind farms stealing the cooling capacity of the wind?
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4
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789
B Describing the cooling of a room without any electrical or mechanical devices
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492
B Does movement affect H2O freezing temperature?
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822
I Effects of altitude on liquid CO2 utilization
2
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2K
How much power does it take to heat up air?
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35K
I Heat Conductivity with Aluminum Foil
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565
I Work done in cycle of a refrigerator (in Heat and Thermodynamics by Zemansky)
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1
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435
I Measurement of heat as an interval measurement or a ratio measurement
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9
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554
I Calculation of temperature changes (heating a cube in a microwave oven)
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9
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851
I Area under the curve of a temperature-time graph -> energy?
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10
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1K
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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4
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595
B Heat pump as a heat engine that operates in reverse
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3
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658
A Work done during adiabatic expansion on piston
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8
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666
I Simulating a 2-Phase Water System: Tips and Resources for Dynamic Simulation
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4
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585
I Questions about my Understanding of Thermodynamics and Statistical Mechanics
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2
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565
I Adiabatic cooling in this process involving liquid ammonia
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5
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683
I H2O/gold solution will not boil
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14
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841
A Time needed to freeze an insulated pipe
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10
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1K
A Proof of thermodynamic stability condition
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4
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785
B What would happen to perception if temperatures almost reached absolute zero?
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2
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748
I Can buoyancy exchange still happen in a gravitational fed water system with closed hydraulic head?
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2
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738
I State equations for a thermodynamic substance/system
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9
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931
A Question about F.Reif page 66 (thermal interaction of systems)
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4
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1K
I Question about the Zeroth law of thermodynamics and Equlibrium
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4
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760
I This gas work violates 2nd law of thermodynamics?
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26
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2K
I Application of the first law of thermodynamics
2
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2K
I Why does an ideal gas satisfy ##(\partial U/\partial P)_T=0##?
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3
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651
I Graphical difference between adiabatic and isothermal processes.
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1
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743
I Adiabatic Processes: Why does this equation use constant volume and not constant pressure?
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7
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924
I Thermodynamic temperature scale and Carnot cycle
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2
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869
I Kinetic equation of gases: time between collisions instead of time of colission?
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2
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790
I Statistical ensemble in phase space
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29
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1K
A Clear night sky radiative cooling -- How to optimize?
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2
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829
A Combined diffusion coefficient for gas mixture
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0
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733
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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21
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2K
A Why is the concept of cycles overlooked in causation models?
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4
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I Sign convention on work done to a closed system containing gas
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5
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I Irreversible adiabatic processes & entropy change (clarification needed)
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22
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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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2K
I Enthalpy change in a flow process
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2
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924
A Can Hamson-Linde cycle liquidize N2?
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997
I Time for a cold volume of air to reach a higher air temperature
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11
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B Home mobile air conditioning: Is this a contradiction to thermodynamics?
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30
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1K
I Focus Problem for Entropy Change in Irreversible Adiabatic Process
2
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I Obtaining this form for molar energy under virial expansion (Callen)
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23
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1K
I Equilibrium constant change with stoichiometric doubling (Callen)?
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5
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972
I How to see this form for the chemical potential of an ideal gas?
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6
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1K
I Does Callen's Entropy Expression for a General Ideal Gas Contain an Error?
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19
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1K
I Effective Emission Height Calculation?
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7
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1K
I Is low entropy found in something very hot?
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26
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2K
I Warm-up time for a hollow cylinder
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5
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1K
A Temperature and pressure change in an air vessel
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3
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1K
A Dual gas (coupled) cyclic processes?
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8
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1K
I Energy balance over a methanol reformer
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4
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1K
I Why is ##dQ = dH## still valid for chemical reaction (Callen)?
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31
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1K
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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1K
I How can the maximum entropy and minimum energy principles be physical?
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13
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2K
I How to know when a reversible process between end states exists?
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12
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1K
I Helmholtz entropy of ideal gas mixture is additive?
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3
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1K
A Efficiency of Two Carnot Engines Operating in Series
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1K
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?
2
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I Galaxy redshift and thermodynamics
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10
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I Measuring Steam Condensate from my Steam Cleaner
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8
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1K
I Will Heating a Sealed Container Cause All Liquid to Convert to Vapor?
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18
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1K
I Confusion on Callen's Maximum Work Theorem
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7
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1K
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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32
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A Does anyone know typical values of cutoff ratio in diesel engines?
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1
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1K
Kinetic-Potential energy of moving Ice
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7
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B Energy seems to disappear when gas is compressed?
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3
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1K

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