Thermodynamics Forum

Post thread
High School Using battery energy to heat a battery…
  • · Replies 7 ·
Replies
7
Views
805
Undergrad Using the "triple point of water" to produce ice -- How does that work?
  • · Replies 2 ·
Replies
2
Views
351
Undergrad Identification of changes in internal energy with work (in Callen's Thermodynamics)
  • · Replies 5 ·
Replies
5
Views
620
Undergrad Can somebody explain this: Planck's Law in action
  • · Replies 16 ·
Replies
16
Views
1K
Undergrad What thermal cycle would describe the action of a candle carousel?
  • · Replies 4 ·
Replies
4
Views
708
Undergrad Why use Stefan's Law to measure temperature?
  • · Replies 20 ·
Replies
20
Views
1K
Graduate A single molecule diffusion in ideal gas
  • · Replies 7 ·
Replies
7
Views
556
Undergrad Question about the absorption of heat based on color
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Detection of hot spots with a thermal (non-radiometric) camera
  • · Replies 19 ·
Replies
19
Views
892
High School Why would an atmosphere without greenhouse gasses be colder than with them?
  • · Replies 33 ·
2
Replies
33
Views
2K
Undergrad Ramjet effect on drone
  • · Replies 15 ·
Replies
15
Views
850
High School Basic thermal energy transfer physics: Insulation value in open airways vs sealed airways
  • · Replies 4 ·
Replies
4
Views
471
Undergrad Is Callen right in claiming dQ=TdS for all quasi-static processes?
  • · Replies 2 ·
Replies
2
Views
435
Undergrad Simple thought experiment with Stefan-Boltzmann law: energy
  • · Replies 7 ·
Replies
7
Views
758
Undergrad Thermo Hydrodynamic Effect
  • · Replies 1 ·
Replies
1
Views
483
Undergrad Entropy and configurations of microstates
  • · Replies 5 ·
Replies
5
Views
589
Undergrad Why work is PdV and not (P+dP)dV in an isothermal process?
  • · Replies 6 ·
Replies
6
Views
538
Graduate Condensate rate of water for an air conditioning cooling coil
  • · Replies 12 ·
Replies
12
Views
585
Undergrad What does equiprobable mean in the context of thermal motion?
  • · Replies 116 ·
4
Replies
116
Views
3K
High School Energy transfer water > air in a greenhouse
  • · Replies 5 ·
Replies
5
Views
555
High School Intuitive Explanation of Adiabatic Condition
  • · Replies 5 ·
Replies
5
Views
721
Undergrad Why M.Planck used Boltzman distribution to calculate average energy?
  • · Replies 5 ·
Replies
5
Views
1K
High School Comparing energy released to the energy needed to compress a gas (game design scenario)
  • · Replies 14 ·
Replies
14
Views
1K
Undergrad Water Temperature and Different Altitudes
  • · Replies 5 ·
Replies
5
Views
961
Undergrad Taking Derivatives of the Fundamental Property Relations
  • · Replies 10 ·
Replies
10
Views
1K
High School Temperature-Dependence of Viscosity of a Fluid?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Meaning of average pressure in statistical mechanics
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Questions about Jean-Rayleigh's derivation of Ultraviolet Catastrophe
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Do uncapped bottles change the outcome of freezing gas bubbles?
  • · Replies 1 ·
Replies
1
Views
1K
High School How to calculate the efficiency of a steam engine?
  • · Replies 10 ·
Replies
10
Views
1K
Undergrad I'm looking for a substance that boils at room temperature
  • · Replies 23 ·
Replies
23
Views
2K
Graduate Phase change complexity of ammonium carbamate (AC) decomposition and recombination
  • · Replies 0 ·
Replies
0
Views
1K
Undergrad Expected visible vapor time of boiling water at STP without any heat?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad How can visible gas bubbles remain intact inside frozen water?
  • · Replies 8 ·
Replies
8
Views
1K
High School Heat pump as a heat engine that operates in reverse
  • · Replies 19 ·
Replies
19
Views
4K
High School Stirling efficiency and practice
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Will water of uniform temperature with perfect insulation stratify?
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Increasing the COP and the heat pump
  • · Replies 6 ·
Replies
6
Views
1K
High School Why does hot water rise to the top of a water heater?
  • · Replies 66 ·
3
Replies
66
Views
4K
Undergrad What will be the boiling point of fully-filled water in a vacuum container?
  • · Replies 6 ·
Replies
6
Views
2K
High School Energy Efficient Boiling of Eggs
  • · Replies 9 ·
Replies
9
Views
1K
Undergrad Relationship between the divergence of a field and its cause?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Resulting temperature of mixed liquids
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Concepts in Thermal Physics 2nd Ed by Blundell - solutions
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Movable Wall in an Adiabatic System: Same Final Temperature?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Entropy and organized systems
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Paradox: Thermodynamic equilibrium does not exist in gravitational fields
  • · Replies 135 ·
5
Replies
135
Views
8K
Undergrad How Did Ancient Persians Use Ice Pools to Produce Ice in the Desert?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Magnetic field and saturated vapor pressure
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Help me understand heating/cooling principles
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Frozen broccoli thermodynamics
  • · Replies 10 ·
Replies
10
Views
2K
Graduate A question about Vanadium dioxide smart window heating
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How much energy is needed to blow up stone (and other materials)?
  • · Replies 28 ·
Replies
28
Views
3K
Undergrad Calculating vapor pressure from Boltzmann distribution?
  • · Replies 0 ·
Replies
0
Views
1K
Undergrad Statistical physics in 2D world: How to simulate gas and its interaction with objects? (game design)
  • · Replies 6 ·
Replies
6
Views
2K
High School What's the fastest the temperature of something can change?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Variation of air temperature with altitude
  • · Replies 28 ·
Replies
28
Views
3K
Undergrad Do smells travel farther in colder or hotter temperatures?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Gibbs Free Energy Correction Term
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad How to find the change in volume of a solid to a liquid
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad H-theorem and conservation of the Gibbs entropy
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Why does an ideal gas satisfy ##(\partial U/\partial P)_T=0##?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate To calculate dew pressure of hydrocarbon mixture by PC-SAFT
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Availability at fixed pressure and temperature
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Phase Transition in a Pure Water System
  • · Replies 7 ·
Replies
7
Views
2K
High School Does movement affect H2O freezing temperature?
  • · Replies 16 ·
Replies
16
Views
6K
Undergrad Question About Ideal Gas and Average Free Movement of Molecules
  • · Replies 69 ·
3
Replies
69
Views
7K
Undergrad Does the use of microwave communication heat water particles?
  • · Replies 18 ·
Replies
18
Views
3K
Undergrad A paradox about energy balance and steady state
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Why pressure stays the same when doubling both volume and temperature?
  • · Replies 35 ·
2
Replies
35
Views
5K
Undergrad First law of thermodynamics -- two different expressions for dQ
  • · Replies 23 ·
Replies
23
Views
3K
High School Quasistatic condition for a process involving a piston in a cylinder
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Scaling Cake Baking Times
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Combined diffusion coefficient for gas mixture
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Do refrigerants passing through a venturi act like steam?
  • · Replies 8 ·
Replies
8
Views
2K
High School Why are the relative fluctuations of intensive properties so small?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How to Confirm the R-Value of a Piece of Insulation?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Energy Required to Evaporate Water
  • · Replies 23 ·
Replies
23
Views
3K
Undergrad How to calculate the mass of gas in a tank?
  • · Replies 109 ·
4
Replies
109
Views
8K
Graduate Equating Gas Pressure and Projectile Stagnation Pressure
  • · Replies 4 ·
Replies
4
Views
2K
High School Would isolating the Solar System prevent its heat death?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Does PYroMat only consider ideal gases?
  • · Replies 5 ·
Replies
5
Views
2K
High School Adiabatic processes and temperatures
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Temperature calculation for combustion chamber
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Effects on Engine Overheating and Pressure Dynamics
  • · Replies 4 ·
Replies
4
Views
2K
High School How the temperature of the Earth's surface affects the air pressure above it
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Heat pumps: Questions about compressor pump refrigerant gas and evaporator
  • · Replies 30 ·
2
Replies
30
Views
4K
Undergrad Is equilibrium vapor pressure different in vacuum and in air?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What is the -1st law of thermodynamics?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad How could you build a simple inverse greenhouse box?
  • · Replies 14 ·
Replies
14
Views
3K
  • Redirect
Heat Transfer Coefficient of a circular water duct of rectangular cross section
  • · Replies – ·
Replies
–
Views
–
Undergrad Minimization of the Gibbs energy when number of molecules varies
  • · Replies 16 ·
Replies
16
Views
3K
High School Cooling effect of evaporation occurs even if the surroundings are colder?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Thermal stresses in the stress tensor
  • · Replies 4 ·
Replies
4
Views
992
Undergrad Pressure builds on its own inside this water tank?
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Focus Problem for Entropy Change in Irreversible Adiabatic Process
  • · Replies 60 ·
3
Replies
60
Views
10K
High School Calculating Heat from Drag force on a Rocket Airframe
  • · Replies 24 ·
Replies
24
Views
2K
Undergrad How can concentration gradient field come into existence immediately?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Efficiency of cycles bounded by two isotherms
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad An experiment against the second law of thermodynamics
  • · Replies 37 ·
2
Replies
37
Views
5K