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asaf asaf
wrote...
Posts: 32
Rep: 2 0
13 years ago
A container is filled with ice in a pressure of 1 atm.
The container is in a bath that keep its Temperature constant - 273.15 K.
We cover the ice with a piston, and we press the piston with 100 atm.
We wait until the system reaches equilibrium.

Given is:
delta(fus)Hm = 6 [kj/mol]
dVm (ice->water) = -1.73 [cm^3/mol]

What is the process that will happen, when the pressure is applied on the piston (Choose only one):
a) Temperature will increase
b) Ice will melt
c) System will go back to equilibrium by decreasing its Temperature
d) Nothing will happen
e) Sublimation will occur
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9 Replies

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asaf Author
wrote...
13 years ago

Additional Details
b) By how many Kelvin degrees (in Absolute value) we should cool the system at a pressure of 100 atm, for that the water will refreeze?

27 seconds ago
wrote...
Staff Member
13 years ago Edited: 13 years ago, duddy
Is this a physics problem? Undecided

What is the process that will happen, when the pressure is applied on the piston (Choose only one):

a) Temperature will increase
b) Ice will melt

c) System will go back to equilibrium by decreasing its Temperature
d) Nothing will happen
e) Sublimation will occur

The Standard Gas Law; PV=nrt shows, by inspection, if no other variable changes, pressure decrease will result in temperature decrease. And, of course, vice versa.

I'm really not too sure. Confounded Face
- Master of Science in Biology
- Bachelor of Science
asaf Author
wrote...
13 years ago
this is the only option that is for sure is not rigth . Face with Rolling Eyes
wrote...
Staff Member
13 years ago Edited: 13 years ago, duddy
Which one is correct then? Sorry, I'm not a physics person. It could even be (E), but I would have to perform some calculation to show it.
- Master of Science in Biology
- Bachelor of Science
asaf Author
wrote...
13 years ago
sorry i didnt saw it all the rigth one ', it turns out that Ice will melt.
wrote...
Staff Member
13 years ago
So the answer is (B)?
- Master of Science in Biology
- Bachelor of Science
asaf Author
wrote...
13 years ago
yes lol
wrote...
Staff Member
13 years ago
Awesome, what topic is this for? Neutral Face
- Master of Science in Biology
- Bachelor of Science
asaf Author
wrote...
13 years ago
physical chemestry -Physical Equilibrium
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