2006-11-18 07:58:22 · 6 answers · asked by Iain M 1 in Science & Mathematics ➔ Engineering
delta S>0, according to the third law of thermodynamics, entropy always increase.
2006-11-18 15:24:41 · answer #1 · answered by chanljkk 7 · 0⤊ 0⤋
This will only occur locally, but it is probably because as the gas expands, the overall energy of the gas is thinned out, and there may be local focii of order. But I do agree that over the entire system, entropy increases
2006-11-18 22:55:27 · answer #2 · answered by BadWolph 3 · 0⤊ 0⤋
The change of entropy of a system can be calculated from:
integral dq/T. Thus, if entropy change is to be negative then, provided the assumption of reversibility can be maintained, the
integral dq/T must be negative. This means that heat must be rejected from the expanding gas.
2006-11-19 00:34:01 · answer #3 · answered by clausiusminkowski 3 · 0⤊ 0⤋
I noticed that a fart doesn't smell so bad after it spreads out into the room.
This exactly describes an entropic gas that is expanding into the space.
2006-11-18 08:12:38 · answer #4 · answered by Chris_Tains 2 · 0⤊ 0⤋
In any circumstances where the order of molecules is decreased.
2006-11-18 08:15:37 · answer #5 · answered by silberstein_9 3 · 0⤊ 0⤋
entropy isnt a quantifiable constant so the question is meaningless as there is no unit of entropic decay.
2006-11-18 14:41:49 · answer #6 · answered by cedley1969 4 · 0⤊ 0⤋