Timeline for Concept of enthalpy at a given temperature
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 12, 2019 at 21:25 | review | Close votes | |||
| Feb 13, 2019 at 21:19 | |||||
| Feb 12, 2019 at 20:47 | history | edited | andselisk♦ | CC BY-SA 4.0 |
deleted 10 characters in body
|
| Feb 12, 2019 at 20:21 | vote | accept | ACR | ||
| Feb 12, 2019 at 20:06 | comment | added | ACR | @Mithoron, that is the same thing as saying that enthalpy is a state function, which was already stated in the original post. As Sherlock Holmes would have said, "it is elementary my dear Watson". | |
| Feb 12, 2019 at 17:19 | comment | added | Mithoron | This is Hess law really elementary stuff. | |
| Feb 12, 2019 at 13:07 | answer | added | Chet Miller | timeline score: 3 | |
| Feb 12, 2019 at 9:29 | answer | added | Buck Thorn♦ | timeline score: 2 | |
| Feb 12, 2019 at 5:41 | comment | added | Ivan Neretin | Not really. See, thermodynamics is full of imaginary processes. We talk about the things like enthalpy of formation all the time, even though the corresponding reaction (that of formation of our compound from the elements) is often impossible. Same thing here. Whether the process can be actually performed or not is irrelevant. With that in mind, yes, in some cases it can be done, and that's what they do in DSC. | |
| Feb 12, 2019 at 5:29 | comment | added | ACR | Once I get Shoemaker's book, I will share the exact quote. Till then let us wait for other opinions which can be referenced. I mean we all know matter is made from atoms, yet we still find it written in textbooks :-) I feel you are bringing the DSC (differential scanning calorimetry) working principles in here. en.wikipedia.org/wiki/Differential_scanning_calorimetry | |
| Feb 12, 2019 at 5:20 | comment | added | Ivan Neretin | Er... I don't mean to be rude, but this is pretty much equivalent to asking how do I know that after stepping with my left foot when walking, I should step with my right foot, then again left and so on, and whether I have seen that written somewhere. Yes, that's how things are done in this field, and have been for a while. | |
| Feb 12, 2019 at 5:08 | comment | added | ACR | Interesting, but I never heard of this approach before. You mean T_initial is the same as T_final, eventually? Have you seen this written somewhere? I am in the field of chem for a while and searched scores of books but never saw this explanation. | |
| Feb 12, 2019 at 4:55 | comment | added | Ivan Neretin | Well, you run your reaction, then you let the products cool down back to the temperature where you started, and that is your final state. | |
| Feb 12, 2019 at 3:51 | history | asked | ACR | CC BY-SA 4.0 |