Recent content by thonwer

Homework Statement Which is the electron configuration of the Ni+ ion? Homework Equations Ni : [Ar]4s23d8 The Attempt at a Solution Ni+: [Ar]4s13d8 Apparently this solution is wrong and should be Ni+: [Ar]3d9 but I do not know why. As far as I know 4s has less energy than 3d so, why does one...

Homework Statement Show that in Solid to Liquid transitions at T \ll {T}_{c} , L\simeq constant where {T}_{c}, L are the critic temperature and latent heat respectively. Homework Equations \left( \frac{d ( \frac {L} {T})} {dT} \right) = \frac {{c}_{p2}-{c}_{p1}} {T}+ \frac...

Can I separate variables? Or do I have to use another method?

Homework Statement Show that in Solid to gas and Liquid to gas transitions at T \ll {T}_{c} , L\simeq a+bT where {T}_{c}, L are the critic temperature and latent heat respectively and a,b constants.Homework Equations \left( \frac{d ( \frac {L} {T})} {dT} \right) = \frac...

Have I done it in the right way? (I forgot to put the question :oops:)

Homework Statement Find: Homework Equations The Attempt at a Solution

Mmm statiscal thermo is a subject I will study next year, so if there's no other proof I suppose experimental proof is what I need.Thank you.

I'm studying Physics, and I know it is a continuous function of entropy and volume, but one thing is knowing and another is proving. I need to prove this knowledge.

I think it's continuous, I know from theory, but it's not a given in the problem, so if i use it, I have to say why. As I don't know how to justify that U is continuous, I think that, if I can demonstrate that Schwartz relation is valid, then, I can avoid justifying its continuity.

Nothing, but in an exam I would have to reason why I assume that U is continuous, so if I could go from -\left( {\frac{\partial P} {\partial S}}\right)_{V,n} to \left( {\frac{\partial T} {\partial V}}\right)_{S,n} by using derivatives and their properties, the problem would be solved I think.

If I say they are equal, I am assuming that Schwartz relation is valid in this case, or that U is a continuos function. I want to demonstrate why Schwartz relation is valid.

Yes I see that, but I ment to obtain −(\frac {∂P} {∂S})_V,_n from (\frac {∂T} {∂V})_S,_n or viceversa, demonstrating Schwartz relation in some way.

Homework Statement Show that: (\frac{∂T} {∂V})_S,_n=-(\frac {∂P} {∂S})_V,_n Homework Equations dU=TdS-PdV+μdn The Attempt at a Solution \frac {∂} {∂S} (\frac{∂U} {∂V})_S,_n=-(\frac {∂P} {∂S})_V,_n \frac {∂} {∂V} (\frac{∂U} {∂S})_V,_n=(\frac{∂T} {∂V})_S,_n I tried to isolate T and P...

Yes that's the situation, thank you :smile:

Now I get it thank you :biggrin: so in both cases I described, the car-system would reach the point at the same time? In the first one the grain would slow the car, and in the second one too but the grain leaking out would not affect the new speed or am I wrong?