Updated: 2023-10-31 19:23:04
Surroundings are in general infinite, so even if the reaction cools immediate surroundings for a moment, heat will flow back till the temperature of the mixture is back to the ambient temperature.
Updated: 2023-10-31 13:48:53
I have a question about the mark scheme for an exam question about an endothermic reaction. The graph shows temperature decreasing, then increasing again once the reaction is finished. The mark scheme says the reason for the increase is because energy is transferred to the solution from the surroundings. I thought that this would make the surroundings cooler, so the temperature would decrease? It’s really annoying me that I can’t wrap my head around this point.
Updated: 2023-10-31 13:06:30
The link here: https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_(Organic_Chemistry)/Fundamentals/What_is_the_pKa_of_watergives an extensive explanation on this topic.
Updated: 2023-10-31 10:49:04
H2O + H2O ->gt H3O+ + OH-Keq = [H3O+][OH-]/[H2O]2 bsp Kw = Keq[H2O]2 = [H3O+][OH-] = 10-14Kw/[H2O] = ka = Keq[H2O] = 10-14/[H2O]= 10-14/[55,51] = 1,8*10-16 = 10-15,74
