Final answer:
When matter absorbs heat, it will undergo a phase transition.
Step-by-step explanation:
When matter absorbs heat, its temperature will rise until it undergoes a phase transition.
A phase transition is a physical change in the state of matter, such as the transition from a solid to a liquid or from a liquid to a gas. During a phase transition, the absorbed heat is used to break the intermolecular forces holding the particles together, rather than increasing the temperature of the substance.
For example, when ice absorbs heat, its temperature will rise until it reaches 0 degrees Celsius. At this point, further heat absorption will cause the ice to undergo a phase transition into water, even if the temperature remains constant.