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But earlier you wrote.JEP: Im afraid youve misunderstood me. I have never asserted there is no such thing as spontaneous reactions that lower entropy and endothermic reactions that raise entropy, they are just rare.
But endothermic reactions need heat energy in order to complete the reaction. They absorb this heat from the system and actually lower thermodynamic entropy. These reaction are non-spontaneous because they cannot go off unaided.
ME: LOL.....What the heck is a spontaneous endothermic reaction? The two terms are oxymorons. An endothermic reaction must absorb heat in order to react. This is the exact opposite of a spontaneous reaction.
Scott likes to follow me around the Internet and collect my writings
Today at 11:17 PM Jeptha said this in Post #127
BTW endothermic reactions do not lower thermodynamic entropy
JEP: Really? Please explain to me how heat can be absorbed within a system and entropy not decrease.
Yesterday at 11:51 PM Jeptha said this in Post #129
"The energy utilized to cause the reaction would result in a net increase in entropy"
JEP: No it wouldn't. You have it exactly backward. Most endothermic reactions must absorb energy in the form of heat from the system in order to go off. This decreases the free heat in the system. And when heat is decreased in a system, entropy decreases.
Finally, would you please lay off the quote boxes and colored text? This really messes up my word processor as the boxes wont delete.
Today at 05:27 AM gentu said this in Post #137
Once again, for a non-spontaneous endothermic reaction to occur, energy must be put into the system. Where does this energy come from? Nuclear reactors? (Stars even?) Coal power plants transforming heat energy into electric? None of these processes are 100% efficient, so the amount of energy available in the Universe to do available work decreases. That means that, for the Universe as a whole, entropy increases.
Now, for the non-spontaneous endothermic system in question, its entropy does decrease. However, this is at the expense of a greater increase in entropy elsewhere.
Just what are you trying to argue in the first place? We've strayed pretty far off topic.