Timeline for Change in heat in Isothermal process
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 8, 2018 at 13:08 | comment | added | Nicolas | Indeed, I was merely pointing that out in case someone wonders why the sign is opposite in many textbooks. | |
| Nov 7, 2018 at 17:09 | comment | added | Bob D | @Nicolas Yes that is often how it is expressed in chemistry. But when it is, W is positive if done one the system and negative if done by the system (reverse of the case where delta U = Q-W). It doesn't matter since in both cases energy in is a positive change in internal energy and energy out a negative change, | |
| Nov 7, 2018 at 15:23 | comment | added | Nicolas | Note that the sign of $W$ is a matter of convention; in many places, $W$ is work recieved by the system (just as heat), in which case the 1st law reads $\Delta U=Q+W$ | |
| Nov 7, 2018 at 14:47 | history | answered | Bob D | CC BY-SA 4.0 |