Recent questions in Thermal Physics

Helmholtz Free Energy
Answered

Jayden Mckay
2022-05-09

A) Gibbs Energy function

B) Enthalpy

C) work

D) Helmholtz energy function

Calorimetry
Answered

Ainsley Zimmerman
2022-05-09

I am trying to solve numerical problem based on calorimetry. The water equivalent of a calorimeter is given in grams. But how is it possible as

w= mc and unit of m*c is Cal/°C.

where w= water equivalent

m= mass of the water

c= specific heat of water

Helmholtz Free Energy
Answered

Cesar Mcguire
2022-05-09

Boiling Point of Water
Answered

Angelique Horne
2022-05-09

Report your answer in units of °C using two decimal places. Do not include units in your answer.

Calorimetry
Answered

agrejas0hxpx
2022-05-09

Body X of temperature 0° C is brought into thermal contact with body Y of temperature 100° C. X has specific heat capacity higher than of Y. The masses of X and Y are equal.

By my reasoning, the final equilibrium temperature should lie between 0° C and 50° C. Is this correct?

Edit: 1) The bodies are in thermal contact only with one another; they are in a closed system.

2) My reasoning:

${Q}_{x}={m}_{x}{c}_{x}\mathrm{\Delta}{T}_{x}$

${Q}_{y}={m}_{y}{c}_{y}\mathrm{\Delta}{T}_{y}$

${Q}_{x}={Q}_{y}$, ${m}_{x}={m}_{y}$

${c}_{x}\mathrm{\Delta}{T}_{x}={c}_{y}\mathrm{\Delta}{T}_{y}$

If ${c}_{x}$ is higher than ${x}_{y}$, then $\mathrm{\Delta}{T}_{x}$ must be lower thab $\mathrm{\Delta}{T}_{y}$, so the equilibrium temperature must lie below 50° C.

Helmholtz Free Energy
Answered

Yaritza Oneill
2022-05-09

A. $dA=-Tds-VdP$

B.$dA=-SdT+PdV$

C. $dA=SdT+PdV$

D. $dA=-PdS-SdV$

Boiling Point of Water
Answered

Oberhangaps5z
2022-05-08

${T}_{F}=1.80({T}_{C})+32$

Boiling Point of Water
Answered

Alexis Meyer
2022-05-08

Helmholtz Free Energy
Answered

kromo8hdcd
2022-05-08

Helmholtz Free Energy
Answered

Micah Haynes
2022-05-08

Helmholtz Free Energy
Answered

Daphne Haney
2022-05-08

Calorimetry
Answered

mikior9t3ue
2022-05-07

From Joule's laws, we get this:

$H\propto {I}^{2}Rt$

$\phantom{\rule{thickmathspace}{0ex}}\u27f9\phantom{\rule{thickmathspace}{0ex}}H=K{I}^{2}Rt...(i)$

Now, we have to find/define the value of K. According to my book, when $1A$ of current passes through a conductor of $1\mathrm{\Omega}$ for $1s$, $1J$ heat is produced. If that's the case, then from $(i)$ we get this:

$1=K\times 1\times 1\times 1$

$\phantom{\rule{thickmathspace}{0ex}}\u27f9\phantom{\rule{thickmathspace}{0ex}}K=1$

Therefore, we get our nice little formula:

$H=K{I}^{2}Rt$

My question with the above derivation is, how did we find that when $1A$ of current passes through a conductor of $1\mathrm{\Omega}$ for $1s$, $1J$ heat is produced? Through experimentation? What was the name of the experiment and who conducted it?

Boiling Point of Water
Answered

Angelique Horne
2022-05-07

Boiling Point of Water
Answered

Kymani Shepherd
2022-05-01

Freezing Point of Water
Answered

Davon Trujillo
2022-04-30

I know that the freezing point of salt water is less than 0 °C (it goes down to around -21 °C for a fully saturated solution), but that's not what this question is about. There's no change in the ambient temperature.

Does adding the salt create a reaction that adds or removes heat? or does the temperature just remain the same?

Helmholtz Free Energy
Answered

nrgiizr0ib6
2022-04-30

Calorimetry
Answered

Caitlyn Cole
2022-04-26

The time component of the 4-momentum is $E/c$, and I saw that it is the "total energy" and from here we can derive the formula ${E}^{2}=(pc{)}^{2}+{m}^{2}{c}^{4}$

$E$ is the total energy? Can't it be some multiple of it or just some other energy?

Helmholtz Free Energy
Answered

Noelle Wright
2022-04-12

If you are looking for thermal expansion physics problems with solutions, you are in the right place because we have a great selection of questions and answers that will help you to understand this amazing concept and apply it in practice. There are thermal physics solutions that are related to lab experiments and equations, based on what discipline is approached or what objectives must be met. Make sure that you read through each explanation presented and compare some tasks to see what scientific methods and solutions are most efficient for your case (kinetic theory of gases, thermodynamics, or statistical mechanics).