Sublimation, when a solid transforms into a gas, is an endothermic phrase change, while deposition, when a gas transforms to a solid, is an exothermic phase change. There are a total of six phase changes in matter, and t... More » Science Chemistry States of Matter

Sublimation is an endothermic process, which means that energy must be added to a substance to facilitate the process. Sublimation is the term that describes a solid substance turning directly into a gas. More » Science Physics Thermodynamics

Evaporation is an endothermic process. These types of reactions occur when the temperature of the system decreases and the surroundings gain energy. Endothermic reactions end up with an overall positive heat of reaction. More » Science Chemistry States of Matter
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Sublimation is the change in phase from a solid to a gas. It is important to note that no liquid phase is present in sublimation. More » Science Chemistry States of Matter

A phase change in science refers to any substance that changes from one state to another, with possible states being gas, liquid and solid. Substances typically phase change to the closest related state, such as liquid t... More » Science Chemistry

A phase change, also known as a phase transition, is a transformation in the physical state of a certain sample of matter. The phrase is most commonly used to describe the transition of a material between solid, liquid, ... More » Science Chemistry States of Matter

The phase change of a liquid to a solid is referred to as either solidification or freezing. When the temperature of a substance is lowered below the substance's freezing point, the substance goes through a phase change ... More » Science Chemistry States of Matter