form a lattice that minimizes repulsion between like charges while maximizing the attraction between opposite charges. Second, the anion and cation are different entities, and may have completely different volumes.
Enthalpy of hydration is negative because adding H2O within the lattice neutralizes the repulsion between ions with like charges. Neutralizing the repulsion decreases the potential energy withing the lattice and therefore results in a negative enthalpy.
Figure 6.5.16.5.1\PageIndex{1}: Enzymes lower the activation energy of the reaction but do not change the free energy of the reaction.
On the image, ΔG must be instead of ΔH.
enthalpy decreases (energy is released), but there is no change in enthalpy
enhalpy decreases but there's no change in enthalpy?
Figure 6.1.46.1.4\PageIndex{4}: Temperature versus heat. The system is constructed so that no vapor evaporates while ice warms to become liquid water, and so that, when vaporization occurs, the vapor remains in the system. The long stretches of constant temperatures at 0oC0oC0^oC and 100oC100oC100^oC reflect the large amounts of heat needed to cause melting and vaporization, respectively.
Figure 6.1.4 : Temperature versus heat. The system is constructed so that no vapor evaporates while ice warms to become liquid water, and so that, when vaporization occurs, the vapor remains in the system. The long stretches of constant temperatures at 0oC and 100oC reflect the large amounts of heat needed to cause melting and vaporization, respectively.