Recent content by kostikas2002

Wow thanks for the answers! :) Both have given me some food for thought. I'll try looking into your suggestions and if I'm still having a hard time, I'll ask again!

In my chemical thermodynamics class/notes (and other references I've used) it is stated throughout that internal energy U is a function of entropy and volume , i.e. it's "natural" variables are S and V: U = U(S,V) I suspect that I must take this "axiomatically" and move on. Since U is a state...

Hmm I suspect I may have some misconceptions about what it means to have a vapor phase present... I mean, in a closed vessel half filled with water, even before the boiling point, aren't there both liquid and a saturated vapor phase present? That's why we have evaporation, right? The liquid...

Thanks for the reply Chestermiller, sorry I haven't gotten back to the thread until now. But how do we interpret the water phase diagram when we have the other case of a liquid with room above it for a vapor phase? I mean where is the "clue" that there should be two phases present if we rely...

I'm not sure what info the phase diagram provides with regards to this situation. What am I supposed to see? As far as the phase rule, phase p=1, components c=1, so degrees of freedom f=c-p+2=1-1+2=2 right? Does this mean that we can independently vary temperature and pressure?

Thanks for the response! Yes, I'm assuming no air present in the head space. But then how would the piston be balanced? Would the water exert 31.8mmHg on the piston wall from it's fugacity/vapor pressure and another 268.2mmHg in reaction to the piston "pressing" on it? I.e. would we treat it...

Hi, sorry for digging out this old thread, but I have the exact same question and I can't get a firm grasp of the concepts... as I understand it, any container that is filled to any appreciable level will have an outward pushing pressure of whatever gas phase is already inside it (i.e air) plus...