|
|
|
Ricky
SFN Die Hard
USA
4907 Posts |
|
|
Storm
SFN Regular
USA
708 Posts |
|
|
R.Wreck
SFN Regular
USA
1191 Posts |
 Posted - 01/10/2005 : 20:12:38 [Permalink]
|
quote:
quote:
--------------------------------------------------------------------------------
In many real-world chemicals and things the second law can be obstructed or hindered for millions of years.
--------------------------------------------------------------------------------
quote:
--------------------------------------------------------------------------------
Blockage of the second law is absolutely necessary for us to be alive and happy. Not one of the complex chemical substances in our body and few in the things we enjoy would exist for a microsecond if the second law wasn't obstructed. Its tendency is never eliminated but, fortunately for us, there are a huge number of compounds in which it is blocked for our lifetimes and even far longer
--------------------------------------------------------------------------------
quote:
True Ricky but that is not all it says
I got this website from one of you on here when asked to do MYhomework?
And as I told you in the other thread you are misinterpreting this.
quote:
The initial energy push (usually from heat), shown by the small energy "hill" in the diagram below, is the activation energy, Ea, that is necessary to overcome the bond-strength obstacle to the second law in most chemical reactions. Thus, this requirement for input of an initial energy, the energy of activation, hinders both desirable and undesirable reactions from occurring.
An important idea is "Activation energies protect substances from change."
That is what the "blocking" is. Please try to pay attention Storm! |
The foundation of morality is to . . . give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibliities of knowledge.
T. H. Huxley
The Cattle Prod of Enlightened Compassion
|
 |
|
|
Storm
SFN Regular
USA
708 Posts |
|
|
Dude
SFN Die Hard
USA
6891 Posts |
Posted - 01/10/2005 : 22:39:56 [Permalink]
|
Take a glucose molecule, for example. Within the chemical bonds between the carbon, hydrogen, and oxygen there is potential energy.
In the cytoplasm of your cells, glucose is broken into pyruvate. This reaction, aided by enzymes and the input of energy from ATP losing a phosphate group, yields a net of two ATP. (two ATP are required for the reaction, 4 are created as a result) The resulting pyruvate then enter the mitochondria of your cells and take part in a fairly complex process that generates about 38 more ATP molecules.
Glucose stores energy.
Think of it like this. You have a boulder on the edge of a cliff. The boulder at the top has what we call potential energy. If you nudge the boulder over the edge, that potential energy is released. Once the boulder hits the bottom, it's kinetic energy is rapidly dispersed.
The boulder at the top of the cliff is stored energy, so to speak.
In both instances some input of energy is required to release the greater stored energy. Once that energy is released, it follows the rules.
|
Ignorance is preferable to error; and he is less remote from the truth who believes nothing, than he who believes what is wrong.
-- Thomas Jefferson
"god :: the last refuge of a man with no answers and no argument." - G. Carlin
Hope, n.
The handmaiden of desperation; the opiate of despair; the illegible signpost on the road to perdition. ~~ da filth |
|
|
|
|
furshur
SFN Regular
USA
1536 Posts |
Posted - 01/11/2005 : 07:14:20 [Permalink]
|
I don't know who gave you this site but it is not very good. The site states that:
quote:
Blockage of the second law is absolutely necessary for us to be alive and happy. Not one of the complex chemical substances in our body and few in the things we enjoy would exist for a microsecond if the second law wasn't obstructed.
The 2nd law is not 'blocked' for life to exist. The second law is never block or bypassed. The easiest way to look at the second law is to say that the entropy of the universe always increases. If you look at it this way there is no confusion about open or closed systems.
Here is an example of how life does not 'block' the second law.
1 The sun radiates heat and most of it is lost into space.
2 Some of the rays strike the earth, most is re-radiated back into space eventually and lost.
3 Sunlight is used by plants to produce food for growth at less than 100% efficiency the rest of the energy is lost as waste heat.
4 The plants are eaten by a cow and some of the stored energy is used by the cow for growth and maintaining body heat. The heat radiates from the cow and is lost.
5 We eat the cow and the we grow or use the stored energy to move around and radiate the heat back into the environment.
In every step the entropy of the universe increases. The waste heat is the increase in the entropy of the universe. Entropy is why it takes 10 lbs of hay for a cow to gain 1 lb. Since no biological system is 100% efficient the left over energy is lost. By lost I mean that the waste heat energy disipates and cannot be utilized.
|
If I knew then what I know now then I would know more now than I know. |
|
|
|
furshur
SFN Regular
USA
1536 Posts |
Posted - 01/11/2005 : 07:17:47 [Permalink]
|
Storm, I would recommend going to the library and taking out a physics 101 text book and read up on energy. There is generally no intense math in a 101 physics book.
eidted for spelling
|
If I knew then what I know now then I would know more now than I know. |
| Edited by - furshur on 01/11/2005 07:18:32 |
|
|
|
Siberia
SFN Addict
Brazil
2322 Posts |
Posted - 01/12/2005 : 15:46:35 [Permalink]
|
No... not the second law again...!
The poor thing's been raped, flogged, stepped over and prodded with a salty stick over and over again, for cripe's sake. |
"Why are you afraid of something you're not even sure exists?"
- The Kovenant, Via Negativa
"People who don't like their beliefs being laughed at shouldn't have such funny beliefs."
-- unknown
|
|
|
|
R.Wreck
SFN Regular
USA
1191 Posts |
Posted - 01/12/2005 : 16:49:32 [Permalink]
|
quote:
furshur wrote:
The 2nd law is not 'blocked' for life to exist. The second law is never block or bypassed. The easiest way to look at the second law is to say that the entropy of the universe always increases. If you look at it this way there is no confusion about open or closed systems.
The point the website was trying to make was that energy flow is not instantaneous, that it takes time for energy to flow from one state to another. Yes, that doesn't really explain the 2nd law, but it does explain why things don't instantly go to equilibrium. |
The foundation of morality is to . . . give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibliities of knowledge.
T. H. Huxley
The Cattle Prod of Enlightened Compassion
|
|
|
 |
|
Topic Locked
