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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 »

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Melting is a process involving absorption of energy, which means that it is endothermic. A process whereby energy is released into the atmosphere or surrounding region is called an exothermic process. More »

www.reference.com Science Chemistry Atoms & Molecules

Freezing water is an exothermic process because there is a release of energy into the environment in the form of heat. In an exothermic reaction, the change in enthalpy or measure of heat content, is negative. More »

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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 »

www.reference.com 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 »

www.reference.com Science Chemistry

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 »

www.reference.com Science Chemistry States of Matter

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 »

www.reference.com Science Chemistry States of Matter