Thermodynamics Forum

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Negative Kelvin temperature? (Recent Science paper)
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About Entropy and Poincare Recurrence
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7
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3K
How Do Carnot's Efficiency Formulas for Heat Engines Align?
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1
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Which cheap metal would absorb and radiate heat well?
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17
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Why the heat of vaporization decreases with increasing temperature ?
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14
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24K
Temperature Profile -- temperature-length curve of a metal bar
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23
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3K
Swimming pool heating by 16 car radiators on hot loft
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26
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Calculating the output temperature of a Solar Thermal system
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7
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What moves the piston in a Carnot heat engine?
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7
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2K
Transparency, colours and heating of materials
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6
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Do things burn because of the flame or the heat?
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13
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How possibly can heat flow between equally hot bodies?
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17
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2K
Entropy: What Is Unavailable Energy & Real-Life Examples
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13
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Temperature & kinetic energy of particles in solid vs gas
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4
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3K
Specific heat help -- cooling down a metal bar
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1
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1K
What is the connection between enthalpy, mass energy, and internal energy?
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6
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2K
Is it possible to magnify light heat?
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29
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5K
Entropy of system and surroundings
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3
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1K
Temperature dependence of the index of refraction of air
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1
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3K
Thought Experiment on the Dual Nature of EM Radiation
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15
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2K
Heat transferred into a closed system
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5
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2K
Pressure and temperature -- the effects of one upon the other
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2
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1K
How Does Newton's Third Law Clarify Force and Acceleration Misconceptions?
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24
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Why work done on a system causes heat to flow out of it?
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2
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1K
Inverse Square Law, Temperature Change, and Heat Source Temp
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2
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5K
Heat of Fusion for Hydrogen: Calculating Distance from 0.10 g Reaction
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24
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3K
Why is entropy not reversible?
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24
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5K
Temperature of boiling surface
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32
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4K
Calculating Temperature at a Distance from Heat Source
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5
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2K
How to calculate heat released from friction
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2
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2K
Is there a way to calculate the entropy change for an irreversible process?
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3
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2K
Kelvin thermodynamics temperature scale
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9
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2K
Physical Significance of Thermal Diffusivity
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7
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6K
Heat capacity at constant volume and internal energy
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17
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3K
Heat equation from Navier Stokes eqns?
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7
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2K
Heat transfer processes and reversibility
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12
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2K
Internal energy vs. Enthelpy vs. Entropy
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1
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1K
Does Entropy Change in All Adiabatic Processes?
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2
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1K
Water evaporation, temperature, wind and heat capacity?
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2
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2K
Quasi-static and reversible processes in thermodynamics
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1
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3K
Thermodynamics (Closed System) questions
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1
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1K
Converting between λ and ν for Blackbody Radiation?
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6
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1K
Cooling/heating temperature rate change
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4
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1K
Understanding Entropy and Hawking Radiation in Black Holes
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2
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3K
Why does heat engine need to do negative work to surround?
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12
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5K
Looking for resistivity vs. temperature lab charts
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3
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1K
Can the weight of heat be accurately measured in such small increments?
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12
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1K
Temperature increase with stirring?
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6
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5K
Temperature gradient vs thermal boundary layer thickness
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8
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6K
Why must VTOL engines be larger than normal engines?
2
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63
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8K
Does any kind of polarized light transfer heat?
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6
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2K
What happens to entropy when kinetic energy increases in a system?
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1
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1K
General Relativity and Hawking Radiation at the Event Horizon
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4
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1K
Harness Heat Energy for Drone Power - How To?
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6
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1K
Has anyone studied Equilibrium thermodynamics by CJ Adkin?
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9
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2K
As water depth increases, does temperature go below 0C?
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1
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2K
Why can one calculate entropy change for thermal conduction?
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4
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2K
2nd law of thermodynamics -- why?
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15
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2K
Entropy or Quantum Mechanics ?
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7
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2K
Carnot Efficiency: Qh/Ql=Th/Tl Explained
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3
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3K
Negative absolute temperatures
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1
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2K
Jansky for blackbody radiation
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2
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2K
Gases that absorb IR radiation
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5
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2K
Getting Constant Cooling: Examining Heat Leakage
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1
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1K
Is Dropping a Metal Block into a Lake a Reversible Process in Thermodynamics?
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1
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Ionising radiation and light bulbs
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19
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7K
Thermal insulation in quantum computers
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2
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1K
Thermal-expansion coefficients, convection as function of T
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6
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3K
Why Energy Flows Between Temperature-Different Systems
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1
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1K
What is the distinction between thermal and internal energy?
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4
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4K
Cotton Insulation vs Glad Wrap Bag for solar water heater?
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1
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1K
Definition of intensity in radiation
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1K
Radiation that can penetrate everything
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4
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2K
Could one build "thermal power lines"?
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14
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2K
Use of Entropy for a Control Volume in Energy Balance
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1
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1K
Is it feasible to add temperatures?
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3
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1K
Microwave Heating -- 2.4GHz in, IR radiation out....
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1
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Temperature Correction: Get Accurate Wall Surface Temperature
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2
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Entropy vs. enthelpy in chemical reactions.
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1
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1K
Measuring Fireplace Radiation: Techniques and Tools for Accurate Results
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2
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1K
Wheatstone Bridge: No Current Flow?
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6
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2K
What Causes Particle Vibration in Heated Matter?
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3
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2K
Adiabatic Process, Internal Energy vs. Enthelpy.
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2
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3K
How can heat change if temp is constant?
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2
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1K
Thermodynamic definition of volume
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1
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1K
Negative absolute temperatures - Comments
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6
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2K
Why boiling occurs at fix temperature?
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7
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3K
Efficiency of Irreversible Engine
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5
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Enthalpy and the Ideal Gas Law: Understanding Constant Pressure Reactions
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4
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Temperature change in ice water interface
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8
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Entropy of a Gas Under Pressure: Does Temperature Trump Pressure?
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5
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2K
Confusion about 2nd law of thermo
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2
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975
Heat Equilibrium in elliptical cavities, and the second Law
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17
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3K
What is meant by heat capacity at constant pressure?
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2
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1K
Why wouldn't the temperatures be different in this scenario
2
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80
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Blackbody Radiation: Ideal Emitters at Room Temperature
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10
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2K
Density computation for high temperature, low pressure argon
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5
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2K
Heat Transfer between two temperatures
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4
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1K
Heat transfer on a cylinder (doubt)
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5
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1K
Answer: Is My Logic Correct: Reversible Processes & Heat Transfer?
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1
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1K

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