Termo physics nr1 help

  • #1

Homework Statement



In 2 identical containers we have equal mass of helium and Argon at the same temperature.The ratio of the 2 pressures (pressure 1 and pressure 2) knowing that μ helium= 4 kg/kmol and μ argon= 40 kg/kmol is:
a 0.1 b 10 c 5 d 40 e 1/5

Homework Equations


i dont know


The Attempt at a Solution


i dont know
 

Answers and Replies

  • #2
998
15
What macroscopic equation gives the behaviour of ideal gases?
 
  • #3
idk tell me
i got bad marks at physics
 
  • #4
998
15
idk =?
 
  • #5
pv=nrt?
i dont know man physics is not my main thing
 
  • #6
998
15
pV=nRT

Correct.

Now see what is identical in both cases and hence try to see on what physical quantity does p depend.
 
  • #7
p=nrt/v
?
can you please give more hints?
 
  • #8
998
15
Temp is the same for both.
What else is the same?
 
  • #9
R constant and T
n is the quantity
EDIT:Was joking man i know how to do it p1v=m/miu RT
 
Last edited:
  • #10
998
15
Correct.
But if you read the problem CAREFULLY you will notice that there is something else constant.
 
  • #11
HAHAAHAH man now i dont understand
p1v=U x R
??
 
  • #12
998
15
Which gas has the bigger volume?
 
  • #14
998
15
is the argon in a bigger container?
 
  • #16
998
15
Each gas in an IDENTICAL container. Hence the volume ...
 
  • #17
Ok so volume is constant.Here is what i made so far.
Find p1 and p2
P1=1/μ helium *R
P2=1/μ argon *R

and then P2/P1 = 10.

so from those answers: a) 0.1 b)10 c)5 d)40 e)1/5

the right one is b?
 
  • #18
998
15
P argon/P helium = 0.1
 
  • #19
998
15
P helium/P argon = 10
 
  • #20
P helium/P argon = 10

so its 10?
i did it good?
can you help me at the other problem too? :D
 
  • #21
998
15
which problem?
 
  • #22
At boiling whit 1K(kelvin) of a gas whit constant pressure the volume is 3 times bigger.The initial temperature of the gas in this process has the value:
a. 6K b 0.5 K c 10K d 100K e 500K
 
  • #23
998
15
Which equation gives the behaviour of an ideal gas?
 
  • #25
998
15
Cross out the P because it is the same on both sides.
 
  • #26
yup so v/t = v2/t2 .
What i do next?
 
  • #27
998
15
Now put in the values you know to get what you do not yet know.
 
  • #28
So T2= t1 +1k?
V2 = 3V1?
WE know that the second volume is 3x bigger then the first volume.
 
Last edited:

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