reamio
March 19th, 2007, 06:05 AM
No, actually when you heat something you increase the level of order, therefore you decrease entropy. Things tend to go towards entropy, things tend to cool down.
Absolute Zero is absolute entropy.
I beg to differ. As far as I understand it,
There are 2 main types of entropy in a system: Positional disorder and Thermal disorder. In Positional disorder entropy increases as you change the state of matter from solid-liquid-gas and in reverse from gas-liquid-solid entropy decrease. in Thermal disorder entropy increases as heat increases and as heat decreases entropy also decreases. if there is an increases in disorder then the reaction will be spontaneous. if there is a decrease in disorder then it is spontaneous.
Think about it: the disorder in a solid cube of ice (crystals all perfectly aligned) is less than in water vapor (molecules shooting around the room rapidly in a random manner):rolleyes:
Also, I disagree with "... things tend to cool down". It depends on what temperature they started at. Things that are warmer than the ambient temperature tend to cool down, things that are colder tend to warm up.:D
In each case, the total entropy of the system increases according to the second law of thermodynamics.
Frunk: it's not my intention to nit-pick, I just wanted to get things straight for our colleagues who aren't familiar with the subject.
Absolute Zero is absolute entropy.
I beg to differ. As far as I understand it,
There are 2 main types of entropy in a system: Positional disorder and Thermal disorder. In Positional disorder entropy increases as you change the state of matter from solid-liquid-gas and in reverse from gas-liquid-solid entropy decrease. in Thermal disorder entropy increases as heat increases and as heat decreases entropy also decreases. if there is an increases in disorder then the reaction will be spontaneous. if there is a decrease in disorder then it is spontaneous.
Think about it: the disorder in a solid cube of ice (crystals all perfectly aligned) is less than in water vapor (molecules shooting around the room rapidly in a random manner):rolleyes:
Also, I disagree with "... things tend to cool down". It depends on what temperature they started at. Things that are warmer than the ambient temperature tend to cool down, things that are colder tend to warm up.:D
In each case, the total entropy of the system increases according to the second law of thermodynamics.
Frunk: it's not my intention to nit-pick, I just wanted to get things straight for our colleagues who aren't familiar with the subject.