Questions tagged [thermodynamics]

Covers the study of (primarily homogeneous) macroscopic systems from a heat/energy/entropy point of view. Consider also using the tag: [statistical-mechanics].

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Setting up differential equations for pressure in a cuboid with a movable wall and 2 compartments

I'm trying to model the following image in matlab and I'm trying to setup a system of differential equations. It's a cuboid with side dimensions 1x1xV(total). In the centre there is a wall that has a ...
1 vote
312 views

Why is my window condensation pattern like this?

There is a condensation-free area that is shaped like $3/4$ of a bell curve. I’m guessing warm air is leaking to the inside, on the bottom, below crest, and also adhering to the edges, preventing ...
1 vote
19 views

How to Measure Temperature Difference in Fluids?

I have an assignment, in which I have to measure the difference of temperature between the base and the surface of a fluid (e.g. oil) that is being gently heated from its bottom, in order to explain ...
60 views

How can the future of the universe and heat death be affected by fluctuations?

I got this question after reading a bit into heat death (https://en.wikipedia.org/wiki/Heat_death_of_the_universe#Time_frame_for_heat_death) In that section, it is indicated that: It is suggested ...
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1 vote
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How to formulate surface temperature of a material exposed to sunlight and wind?

I am currently searching for a model or an approach (reference, course, demonstration) to formulate and estimate surface temperature of a known material (for example, concrete, metal), exposed to ...
1 vote
26 views

Evaporation of a liquid

This is a problem in Callen's book (9.7-3). The phase diagram of a solution of $A$ in $B$, at a pressure of 1 atm and in the region of small mole fraction ($x_A\ll 1$), is as shown. The upper bounding ...
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Calculation of work done in different processes of thermodynamics in Physics and Chemistry

I am a high school student and I am very confused in thermodynamics, My confusion is that :In physics, when we study thermodynamics, we say that we cannot find the work done in irreversible processes ...
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Do we have a fully precise visualized model of a particular protein undergoing allostery?

Allostery is the process by which a protein's conformation changes as a result of a change in its free energy landscape due to some ligand binding to it. This changes its functional properties, ...
1 vote
1k views

Is rust a good thermal insulator as opposed to bare steel or hardened clay?

I have no idea, if this is the correct site to find an answer on this topic, but considering it's a question of physical interactions I wanna give it a shot. I am in no way a physicist, just a ...
1 vote
230 views

Rise and fall of mercury in barometer

A barometer is kept inside a bell jar. Air is slowly pumped out of the jar. If this experiment is performed my book says that the mercury rises. But why so? The barometer is based on the principle of ...
1 vote
576 views

Pressure of a system at the thermodynamic equilibrium

I'm reading a book in which it says that a system is at mechanical equilibrium if the pressure is constant in time but not necessarily uniform in space at any fixed point (for example it can be caused ...
36 views

How to build a reverse greenhouse?

So basically, I stumbled across this concept of radiative cooling. There are a couple of YouTubers who posted videos on this topic. What I understood, was that in passive daylight radiative cooling, ...
164 views

Historical view of the second law of thermodynamics as a complete differential

My question sort of has two parts. I've been reading about the foundations of thermodynamics and statistical mechanics, older texts name the fact that $\frac{\delta Q}{T}$ is a complete differential ...