Answer:
The sublimation of iodine at 25.0°C, which is the process of iodine transitioning from solid to gas phase with no liquid phase in between, can be described as an endothermic process. This is because the transition requires the absorption of energy in order to break the intermolecular attractions holding the solid together and to overcome the intermolecular forces holding the gas molecules apart. Therefore, this process absorbs heat from the surrounding environment, which results in a decrease in temperature. This is why solid iodine is often used as a freezing mixture to cool thermally insulated coolers that store food and drinks.