Recent questions in Thermodynamics

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Martha Richmond 2023-03-24

What is the work for the free expansion of a gas into vacuum?

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mochowskiz3v 2023-02-09

What is an example of an Ideal gas law practice problem?

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Damon Turner 2023-01-09

How to convert Fahrenheit into Celsius and Celsius into Fahrenheit?

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belandong0ir 2023-01-04

What mass of steam at ${100}^{\circ}C$ must be mixed with $150g$ of ice at its melting point, in a thermally insulated container to produce water of ${50}^{\circ}C$ ?

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Moncelliqo4 2022-11-25

The deepest point in the ocean is 11 km below sea level, deeper than Mt. Everest is tall. What is the pressure in atmospheres at this depth?

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Jay Park 2022-11-22

If we keep the voltage in a circuit constant, then

$H=\frac{{V}^{2}}{R}t$

so if I increase the resistance, the current must decrease and so the heat will be less. Then why can't we use very good conductors, like copper, for heat formation?

$H=\frac{{V}^{2}}{R}t$

so if I increase the resistance, the current must decrease and so the heat will be less. Then why can't we use very good conductors, like copper, for heat formation?

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Aliyah Thompson 2022-11-16

In thermodynamics, the enthalpy of a system is defined as the sum of the internal energy of the system and the product of its pressure and volume. Since it is just a combination of other state properties of the system, why need we define it at all?

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Arendrogfkl 2022-11-15

Given two boiling temperatures and pressures, how can I find the latent heat?

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reevelingw97 2022-11-07

I have to prove, considering the limits of high and low temperatures, duality equation:

$Z=q{e}^{2NK}F\left({e}^{-K}\right)={q}^{-N}{({e}^{K}+q-1)}^{2N}F\left(\frac{{e}^{K}-1}{{e}^{K}+q-1}\right)$

for square lattice with

$Z=\sum _{{\sigma}_{1},{\sigma}_{N}}\prod _{<ij>}{e}^{K{\delta}_{{\sigma}_{i}{\sigma}_{j}}}$

$Z=q{e}^{2NK}F\left({e}^{-K}\right)={q}^{-N}{({e}^{K}+q-1)}^{2N}F\left(\frac{{e}^{K}-1}{{e}^{K}+q-1}\right)$

for square lattice with

$Z=\sum _{{\sigma}_{1},{\sigma}_{N}}\prod _{<ij>}{e}^{K{\delta}_{{\sigma}_{i}{\sigma}_{j}}}$

Thermal PhysicsAnswered question

Bayobusalue 2022-11-04

Why does the added heat have to be reversible in the formula for calculating entropy change?

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Rubi Garner 2022-10-21

To find average speed of gas molecule when the temperature is incresed.

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miklintisyt 2022-10-21

I have read in multiple places that the virial coefficients in the virial equation of state, $Z=1+\frac{B}{v}+\frac{C}{{v}^{2}}...$, are functions of temperature only and are independent of pressure (or equivalently, molar volume). Is this purely an empirical observation or is there some deeper statistical mechanics reason why the virial coefficients should not depend on how close the particles are together (i.e. the molar volume)?

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Tessa Peters 2022-10-18

If boiling of water involves change in internal energy, then why does the temperature remain constant?

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Jacoby Erickson 2022-10-16

Could anyone give some definite proof for this?

$\int \frac{{Q}_{rev}}{T}=\mathrm{\Delta}({k}_{B}\mathrm{ln}\mathrm{\Omega})=\mathrm{\Delta}S$

$\int \frac{{Q}_{rev}}{T}=\mathrm{\Delta}({k}_{B}\mathrm{ln}\mathrm{\Omega})=\mathrm{\Delta}S$

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Chaim Ferguson 2022-10-15

So the heat capacity ratio is the ratio of the heat capacity at constant pressure to heat capacity at constant volume. Since there is no pressure in the vacuum, the heat capacity ratio of the vacuum should be zero. Is this right ?

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duandaTed05 2022-10-13

In Ashcroft and Mermin Chapter 1, just above equation (1.50) and in the context of a classical ideal electron gas, it is said that the electronic specific heat at constant volume ${c}_{v}$ is defined by

${c}_{v}=\frac{\frac{dE}{dT}}{V}$

which seemed highly irregular to me (I would have expected division by the mass M of the system of electrons). Is there any reason for this that I am perhaps missing?

${c}_{v}=\frac{\frac{dE}{dT}}{V}$

which seemed highly irregular to me (I would have expected division by the mass M of the system of electrons). Is there any reason for this that I am perhaps missing?

Thermal PhysicsAnswered question

Sariah Mcguire 2022-10-13

Is the statement $dF=(\delta Q-TdS)-pdV-SdT$ more general than $dF=-SdT-pdV$

Thermodynamics is the study of energy and how it is transferred, transformed and even conserved. It's an essential branch of physics, and it's used to understand how energy works in many different fields, from manufacturing to engineering to astronomy. It's also used to understand and predict energy-related changes in the environment. Thermodynamics can help us understand how heating and cooling systems work, why the Earth's atmosphere is constantly changing, and even the formation of stars and galaxies. It's a fascinating field, and one that offers a great deal of insight into the world around us.