- #1
mewmew
- 114
- 0
Here is the problem:
"A careless experimenter left the valve of a tank of helium slightly open over the weekend. The gas, originally at 200 atm, slowly escaped isothermally at 20 degrees C. What change in entropy per kg of gas occured? " I am given, K, N, and Mass of helium per mole.
I am stuck because all I know is:
Delta S = N k Ln[Vf/Vi]
and
P=NkT/V
I can't seem to figure out how to make these work though given the problem at hand. How do I find out what N-final and V-final are? That is assuming I even need to find those out to solve this problem. Any help is greatly appreciated!
"A careless experimenter left the valve of a tank of helium slightly open over the weekend. The gas, originally at 200 atm, slowly escaped isothermally at 20 degrees C. What change in entropy per kg of gas occured? " I am given, K, N, and Mass of helium per mole.
I am stuck because all I know is:
Delta S = N k Ln[Vf/Vi]
and
P=NkT/V
I can't seem to figure out how to make these work though given the problem at hand. How do I find out what N-final and V-final are? That is assuming I even need to find those out to solve this problem. Any help is greatly appreciated!