11.8 Endothermic and Exothermic Changes of State

• Two types of changes of state
• Endothermic – system absorbs heat (heat is required)
• Which ones are endothermic?
• sublimation, evaporation, melting
• Exothermic – systems release heat (heat is released)
• Which ones are exothermic?
• deposition, condensation, freezing