# Thermal physics questions with answers

Recent questions in Thermal Physics
Jayden Mckay 2022-05-09

### The differential of which quantity is inexact?A) Gibbs Energy functionB) EnthalpyC) workD) Helmholtz energy function

Ainsley Zimmerman 2022-05-09

### Water equivalent of calorimeterI am trying to solve numerical problem based on calorimetry. The water equivalent of a calorimeter is given in grams. But how is it possible asw= mc and unit of m*c is Cal/°C.where w= water equivalentm= mass of the waterc= specific heat of water

Cesar Mcguire 2022-05-09

### The Helmholtz free energy for a system of N harmonic oscillators

Angelique Horne 2022-05-09

### Calculate the boiling point of a solution of 154.09 g of ethylene glycol $\left({C}_{2}{H}_{6}{O}_{2}\right)\left(MM=62.0678\right)$ dissolved in 405.00 g of water. ${K}_{f}={1.86}^{\circ }C/m$ and ${K}_{b}={0.512}^{\circ }C/m$. Use ${100}^{\circ }$ as the boiling point of water.Report your answer in units of °C using two decimal places. Do not include units in your answer.

agrejas0hxpx 2022-05-09

### Equilibrium temperature of closed systemBody 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.

Yaritza Oneill 2022-05-09

### Given thepartial differential forms $\left(\frac{\mathrm{\partial }A}{\mathrm{\partial }V}{\right)}_{T}=P$ and $\left(\frac{\mathrm{\partial }A}{\mathrm{\partial }T}{\right)}_{V}=-S$ what is the total differential of Helmholtz Free Energy in this case? Neglect all possible effects ofchemical potentials and assume that the process can occur.A. $dA=-Tds-VdP$B.$dA=-SdT+PdV$C. $dA=SdT+PdV$D. $dA=-PdS-SdV$

Oberhangaps5z 2022-05-08

### To convert one unit into another then firts needs to choose a conversion factor, this cancels the units and omits in the result. The relation between the scale of Fahrengeit and Celcius is as follows:${T}_{F}=1.80\left({T}_{C}\right)+32$

Alexis Meyer 2022-05-08

### What is degrees Fahrenheit between the freezing and boiling points of water?

kromo8hdcd 2022-05-08

### What conditions are necessary for the free-energy change to be used to predict the spontaneity of a reaction?

Micah Haynes 2022-05-08

### Answer the following True or False questions, explaining your reasoning in terms of the laws of thermodynamics where appropriate: (a) The quantities U, H, A, and G all have the same dimensions (i.e. expressed in the same units). (b) A(TS) = (AT)S+TAS. (c) The chemical potential µ¡ of a component i is a state function. d) The chemical potential of benzene must equal the chemical potential of toluene in a benzene-toluene mixture.

Daphne Haney 2022-05-08

### Consider a system in thermal equilibrium, having energies 0 and 'E'. Find the partition function (Z) and Entropy (S) of the system.

mikior9t3ue 2022-05-07

### How to derive the formula for heat produced due to electricity correctly from Joule's laws for heating?From Joule's laws, we get this:$H\propto {I}^{2}Rt$$\phantom{\rule{thickmathspace}{0ex}}⟹\phantom{\rule{thickmathspace}{0ex}}H=K{I}^{2}Rt...\left(i\right)$Now, we have to find/define the value of K. According to my book, when $1A$ of current passes through a conductor of $1\mathrm{\Omega }$ for $1s$, $1J$ heat is produced. If that's the case, then from $\left(i\right)$ we get this:$1=K×1×1×1$$\phantom{\rule{thickmathspace}{0ex}}⟹\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?

Angelique Horne 2022-05-07

### The boiling point of water is measured four times. The results are 110.01°C, 110.02°C, 109.99°C, and 110.01°C. Which of the following statements best describes this measuring process?a) Accurate but not preciseb) Precise but not accuratec) Neither accurate nor precised) Both accurate and precise

Kymani Shepherd 2022-05-01

### One mole of solute particles raises the boiling point of 1.00 kilogram of water by 0.51 C. Calculate the boiling point elevation when 0.300 moles of CaBr2 is dissolved in 500 g of water?

Trace Mcintyre 2022-05-01

### Why is free energy “free” ?

Davon Trujillo 2022-04-30

### If you have a bowl of ice that's melting, so the ambient temperature is just above 0 °C, what happens to the temperature of the water when you add salt?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?

nrgiizr0ib6 2022-04-30