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Results tagged with thermodynamics
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user 124232
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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When the matter is heated does the photon absorbed by electrons of atoms or by atoms themself?
Vibration of atoms is the cause of heat normally. But photons carry energy as they are essentially radiation - for example, the heat transfer in stars more massive than our sun, photons play a massiv …
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Accepted
Can you calculate the supplied heat given a p(V) - Diagram of a isobar process?
The linked source has an accepted answer that explains what you have to do very well. All you have to do is to calculate the temperature at the four points in your diagram by using the ideal gas equat …
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Work done by a heat engine given thermodynamic cycle
HINT: This problem is just using the formula $W=P\Delta V$.
For an isochoric process, $V$ is constant, so $W=0$.
For an isobaric process, $P$ is constant, not $V$. So, $W \not =0$.
Net work done …
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Black body in thermal equilibrium
Thermal equilibrium with the surroundings mean no net energy. This means, the blackbody absorbs as much as it radiates energy at that temperature. Clearly, every body in your room radiates and absorbs …
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Vapour pressure and volume of container
Assuming you have a closed container to begin with, and you increase the volume via some mechanism to have more number of particles in the liquid, then you effectively are reducing the vapor pressure. …
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why do fluids become less dense when heated?
In fluids, upon heating, the intermolecular forces are much weaker as the molecules are susceptible to move around more freely due to their increase in energy. So it is like their spacing between each …
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A place with no temperature?
From the second law of thermodynamics, we are tending to a heat death. …
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Cooking by drowning
I'm assuming that you have a sealed sack of fish. The source of pressure is the weight of water above the sack, which will increase with increasing depth.
I'm imaging a model here. Assuming an adiabat …
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What determines if a lamp produces emission or blackbody spectra?
The hydrogen gas you have isn't absorbing enough heat/radiation to emit in all frequencies. It emits its usual line spectra. You may need to really heat that up to see all the vibration modes to show …
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Derivation of heat capacity at constant pressure and temperature
Imagine we have a container with gas in it. And you supply the heat.
$C_p$ is the heat energy required to raise the temperature of a mass by 1 K, at constant pressure. Likewise, $C_v$ is for consta …
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Work done on a gas enclosed in a container
First of all, if you are talking about the ideal compression where $P_{ext}$ is just bigger than $P_{int}$ by $dP$.
Secondly, when we learnt Newton's laws, we do agree that when we talk about forces …
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Why do energy transfers always result some heat loss?
If a car with some kinetic energy were to smash into another car, some of the transferred kinetic energy is dissipated as heat. Because everything is made up of atoms and they would vibrate as well. I …
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Expansion of an ideal gas at constant pressure
As in the as soon as pressure rises because of the temp rise the volume expands to "counter it". So pressure never really changes much. So it's okay to ignore it for calculations
If the piston m …
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Temperature of a particle moving in a gravity field
Temperature is a measure of the average kinetic energy of an ensemble of particles. So, defining one atom's temperature makes no sense.
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Color temperature or effective temperature?
Color temperature refers to the temperature of the star if we fitted a blackbody curve to only measurements of its visible light spectrum (i.e. the $400 - 700$ nm range).
However, if we gathered data …
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