A pair of students found the temperature of 100 g of water to be 27.0°C. They then dissolved 6.32 g of KOH in the water. When the salt had dissolved, the temperature of the water was 42.5°C. If the temperature of the water is raised, doesn't that mean it retained heat, thus showing that the dissolution was endothermic? I'm having trouble understanding why it is exothermic. Can someone please explain?