K_w for the auto-ionization of water, H₂O(l) $\rarr$H⁺(aq) + OH^- (aq), is 1.0 * 10^-14. What are the signs (+/-) of $\Delta$S^$\circ$ and $\Delta$H^$\circ$ for the reaction at 25^$\circ$C A) ($\Delta$S^$\circ$) = (+) and $\Delta$H^$\circ$= (+) B) ($\Delta$S^$\circ$) = (+) and $\Delta$H^$\circ$ = (-) C) ($\Delta$S^$\circ$) = (-) and $\Delta$H^$\circ$ = (+) D) ($\Delta$S^$\circ$) = (-) and $\Delta$H^$\circ$ = (-)

Question

Quizplus · Accepted Answer

For the auto-ionization of water, H₂O(l) F1F1F1S1F1F1F10 H⁺(aq) + OH^- (aq) The sign of F1F1F1S1F1F1F10SF1F1F1S1F1F1F10 is positive because the reaction is endothermic as heat is required to break the hydrogen bonds between water molecules, and this equilibrium constant always has a positive value. The sign of F1F1F1S1F1F1F10HF1F1F1S1F1F1F10 is also positive as when the temperature increases, the amount of ionization also increases because the reaction is endothermic.

Kw for the Auto-Ionization of Water, H2O(l) →\rarr→ H+(aq) + OH- (Aq), Is 1

K_w for the Auto-Ionization of Water, H₂O(l) $\rarr$ H⁺(aq) + OH^- (Aq), Is 1