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Undergrad The effects of absolute zero temperature

  • Hankelec
  • · Replies 14 ·
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14

Graduate Can Hamson-Linde cycle liquidize N2?

  • jonhswon
  • · Replies 7 ·
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7

Undergrad Time for a cold volume of air to reach a higher air temperature

  • Bhope69199
  • · Replies 11 ·
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11

High School Home mobile air conditioning: Is this a contradiction to thermodynamics?

  • Edwina Lee
  • · Replies 30 ·
2
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30

Undergrad Balloon experiment - Classical Physics vs. Statistical Physics

  • Juanda
  • · Replies 16 ·
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16

Undergrad Mass, Energy and a compressed spring

  • RobbyQ
  • · Replies 11 ·
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11

High School Gas diffusion rates for methane into a vacuum versus into nitrogen

  • Feynstein100
  • · Replies 19 ·
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19

Undergrad Obtaining this form for molar energy under virial expansion (Callen)

  • EE18
  • · Replies 23 ·
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23

Undergrad Equilibrium constant change with stoichiometric doubling (Callen)?

  • EE18
  • · Replies 5 ·
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5

Undergrad How to see this form for the chemical potential of an ideal gas?

  • EE18
  • · Replies 6 ·
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6

Undergrad Does Callen's Entropy Expression for a General Ideal Gas Contain an Error?

  • EE18
  • · Replies 19 ·
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19

Undergrad Effective Emission Height Calculation?

  • PeterG
  • · Replies 7 ·
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7

Undergrad Is low entropy found in something very hot?

  • rolnor
  • · Replies 26 ·
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26

Undergrad Warm-up time for a hollow cylinder

  • defrag
  • · Replies 5 ·
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5

Undergrad Mechanism of action of cooling from fans with misters

  • jsurow
  • · Replies 2 ·
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2

Graduate Temperature and pressure change in an air vessel

  • AmeenBassam
  • · Replies 3 ·
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3

Graduate Dual gas (coupled) cyclic processes?

  • Philip Koeck
  • · Replies 8 ·
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8

Undergrad Energy balance over a methanol reformer

  • Mads_DK
  • · Replies 4 ·
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4

Undergrad Entropy Real? End of Time? - Veritasium Video

  • Happiness
  • · Replies 14 ·
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14

Undergrad Why is ##dQ = dH## still valid for chemical reaction (Callen)?

  • EE18
  • · Replies 31 ·
2
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31

Graduate 1st law of thermodynamics with chemical reaction?

  • Amin2014
  • · Replies 25 ·
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25

Undergrad Derivation of ideal gas heat capacity relationship

  • jasonRF
  • · Replies 6 ·
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6

Undergrad Why does Callen insist a process must be reversible here?

  • EE18
  • · Replies 8 ·
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8

Undergrad How can the maximum entropy and minimum energy principles be physical?

  • EE18
  • · Replies 13 ·
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13

Undergrad How to know when a reversible process between end states exists?

  • EE18
  • · Replies 12 ·
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12

Undergrad Helmholtz entropy of ideal gas mixture is additive?

  • EE18
  • · Replies 3 ·
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3

Graduate Efficiency of Two Carnot Engines Operating in Series

  • SteveMaryland
  • · Replies 9 ·
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9

Undergrad Finding the difference in Helmholtz free energy using thermodynamic integration

  • VVS2000
  • · Replies 3 ·
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3

Undergrad Clarification about Aircraft Over-Wing Fog Formation (Adiabatic)

  • RobbyQ
  • · Replies 8 ·
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8

Undergrad Is Enthalpy a Valid Concept Despite Dimensional Mismatch?

  • Sailor Al
  • · Replies 35 ·
2
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35

Undergrad Galaxy redshift and thermodynamics

  • Bolhuso
  • · Replies 10 ·
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10

Undergrad Measuring Steam Condensate from my Steam Cleaner

  • JoeyF
  • · Replies 8 ·
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8

Undergrad Will Heating a Sealed Container Cause All Liquid to Convert to Vapor?

  • deepanshu_ch
  • · Replies 18 ·
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18

Undergrad Confusion on Callen's Maximum Work Theorem

  • EE18
  • · Replies 7 ·
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7

Undergrad Confusion about the entropy of mixing

  • sha1000
  • · Replies 3 ·
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3

High School Opening this jar is made easier by cooling or heating?

  • robertphy
  • · Replies 8 ·
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8

Undergrad How does evaporation generate cooling? Swamp coolers edition

  • dario2
  • · Replies 32 ·
2
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32

High School Thermal physics, COP upper bound for heat driven heat pumps

  • sf1001
  • · Replies 1 ·
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1

Graduate Does anyone know typical values of cutoff ratio in diesel engines?

  • btostes
  • · Replies 1 ·
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1

Undergrad Why most probable energy and speed do not correspond?

  • meowts
  • · Replies 12 ·
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12

Undergrad So what are the definitions of gas, liquid, solid?

  • swampwiz
  • · Replies 20 ·
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20

Undergrad Kinetic-Potential energy of moving Ice

  • TonyCross
  • · Replies 7 ·
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7

High School Energy seems to disappear when gas is compressed?

  • Wazza
  • · Replies 3 ·
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3

Graduate Understanding Free Expansion of Gas: Velocity Distribution Function Evolution

  • thepolishman
  • · Replies 14 ·
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14

Undergrad Calculating Pressure Change Filling Gas Cylinders

  • fonz
  • · Replies 69 ·
3
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69

Undergrad How do we calculate the energy we used to do something?

  • John Constantine
  • · Replies 10 ·
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10

Undergrad Calculating Entropy & Enthalpy: SRK, Wilson, Antoine & Clausius-Clapeyron

  • FoFi_Olli
  • · Replies 5 ·
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5

High School Why use this premise behind the Maxwell-Boltzmann curve?

  • snoopies622
  • · Replies 8 ·
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8

High School Cooling liquid in rigid container

  • ABC83
  • · Replies 25 ·
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25

Graduate Measurement uncertainty due to thermal noise

  • kelly0303
  • · Replies 4 ·
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4

Undergrad Connecting the microcanonical with the (grand) canonical ensemble

  • Philip Koeck
  • · Replies 37 ·
2
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37

High School Entropy & Information Content: Examining the Difference

  • louislaolu
  • · Replies 2 ·
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2

High School What is meant by "upper limit of work done on Earth"?

  • Lotto
  • · Replies 7 ·
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7

Undergrad Concept of Thermal Equilibrium in the Context of Canonical Ensemble

  • Dario56
  • · Replies 5 ·
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5

Undergrad Atomization and Evaporation: Understanding the Energy Exchange

  • russellsh2
  • · Replies 3 ·
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3

Undergrad Independence of Trace-Partition function

  • George444fg
  • · Replies 1 ·
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1

Undergrad How is combustion energy released?

  • avicenna
  • · Replies 24 ·
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24

High School Heat transfer -- Several questions

  • russellsh2
  • · Replies 6 ·
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6

Graduate Beyond the energy equipartition, what is the uneven partitioning?

  • napdmitry
  • · Replies 13 ·
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13

High School Gas cylinder at constant pressure being exposed to atmosphere, how?

  • bruhtation
  • · Replies 8 ·
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8

Undergrad External Pressure vs. Internal Pressure when considering work

  • MaestroBach
  • · Replies 16 ·
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16

High School Thermos Bottle: Stainless Steel Inside & Out - 24h Cold & 12h Hot

  • barnabe_fisico
  • · Replies 7 ·
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7

Undergrad What is the calculation for value B in Penrose's entropy model?

  • matsu
  • · Replies 20 ·
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20

Graduate Discretization of diffusion equation of a fluid in movement

  • DianeLR
  • · Replies 5 ·
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5

Undergrad Is there a Boltzmann distribution for a system with continuous energy?

  • Old Person
  • · Replies 4 ·
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4

Undergrad Wall material effect on Van der Waals gas?

  • Swamp Thing
  • · Replies 23 ·
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23

Graduate How Does Penrose Calculate Entropy in Cycles of Time?

  • bob012345
  • · Replies 7 ·
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7

Graduate Steady state confined flow field: Is it cyclic?

  • huangdaiyu
  • · Replies 9 ·
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9

Graduate Practical use of an overall heat transfer coefficient?

  • MysticDream
  • · Replies 14 ·
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14

High School Does Avogadro's Law Account for Differences in Gas Density?

  • tomlib
  • · Replies 9 ·
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9

Undergrad How Do You Calculate Equilibrium Conditions After Mixing Two Different Gases?

  • jaumzaum
  • · Replies 3 ·
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3

Undergrad Just for fun: treadmill air conditioner efficiency calculation

  • DynV
  • · Replies 4 ·
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4

Graduate Average temperature in a greenhouse

  • Fefetltl
  • · Replies 2 ·
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2

Undergrad Enthalpy Explained: All You Need to Know

  • muslach
  • · Replies 50 ·
2
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50

Undergrad Is it a fluke that the triple point of water is almost exactly 0°C ?

  • peanutaxis
  • · Replies 4 ·
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4

Undergrad Required kW for cooling and dehumidification + reheating

  • BigNick
  • · Replies 11 ·
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11

High School Conflicting definition of degree of freedom in Kinetic Theory of Gases

  • vcsharp2003
  • · Replies 7 ·
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7

Undergrad Adiabatic expansion work far exceeds isobaric of same volume, why?

  • MysticDream
  • · Replies 81 ·
3
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81

High School Filling a bathtub (Hot water to cold water exchange)

  • archeryemily9085
  • · Replies 6 ·
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6

High School Collision time interval of a gas molecule with wall of container

  • vcsharp2003
  • · Replies 6 ·
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6

Undergrad Energy and sand batteries (thermal energy storage)

  • Matt27RS
  • · Replies 2 ·
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2

Undergrad Is the Boltzmann energy distribution an instance of energy diffusion?

  • SteveMaryland
  • · Replies 8 ·
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8

Undergrad 1D Heat Transfer Analytical Wall

  • kartini99
  • · Replies 3 ·
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3

Graduate Too much cooling air? (Power supply failures due to condensation)

  • powerelect
  • · Replies 1 ·
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1

Graduate Partial Temperature of a Gas in a Mixture

  • hairless_ape
  • · Replies 5 ·
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5

Graduate Heat exchange in a thermal storage based on phase change materials

  • DianeLR
  • · Replies 5 ·
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5

Undergrad Disproving Carnot's Theorem: Is There an Error in My Thinking?

  • phymath7
  • · Replies 3 ·
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3

Undergrad Centrifugal separation into hot & cold air streams?

  • Swamp Thing
  • · Replies 1 ·
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1

High School Compressed R134A refrigerant as a store of energy?

  • seanspotatobusiness
  • · Replies 5 ·
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5

High School How long does it take for the liquid in a 55-gallon drum to thaw?

  • pennym72
  • · Replies 19 ·
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19

High School Entropy change for reversible and irreversible processes

  • vcsharp2003
  • · Replies 12 ·
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12

Undergrad What is the most efficient way to cool air using a Vortex Tube (Ranque-Hilsch)?

  • Swamp Thing
  • · Replies 1 ·
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1

Undergrad Vacuum Drying Vegetables w/ IR Heaters: Investigating Increased Batch Time

  • ravindrar
  • · Replies 2 ·
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2

High School Heat exchange after thermal equilibrium

  • vcsharp2003
  • · Replies 2 ·
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2

Undergrad Cannot understand formula for molar heat capacities of an ideal gas

  • vcsharp2003
  • · Replies 22 ·
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22

Undergrad Time required to cool down a botte of wine

  • Andrea Vironda
  • · Replies 22 ·
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22

Undergrad The Effect of Wind on the Rate an Outside Spigot Freezes

  • bob012345
  • · Replies 17 ·
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17

Undergrad Heat transfer via air cooling -- which airflow direction is best?

  • freeelectron
  • · Replies 3 ·
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3

Undergrad Surface Absorptance Without Radiant Emittance

  • j1230
  • · Replies 1 ·
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1

Undergrad Heating a tungsten filament to find out the maximum brightness emitted

  • Slimy0233
  • · Replies 9 ·
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9