This is a quick question. My textbook lists the heat of solution of KOH as a negative number, and thus the solubility of KOH decreases as temperature is raised. Word for word, my book says "Negative heat of solution: The solute solubility decreases with rising solution temperature". But this wikipedia page: https://en.wikipedia.org/wiki/Solubility_table shows that KOH solubility increases with rising temperature. Can someone please explain this contradiction?