Gas to liquid change releases energy.
The types of phase changes that require energy are melting (solid to liquid), sublimation (solid to gas), and evaporation (liquid to gas). These phase changes require energy input to break the intermolecular forces holding the particles together in a particular phase.
Two phase changes that occur when matter loses heat energy are: Solid to liquid: When a substance loses heat energy, it can transition from a solid phase to a liquid phase. This process is called melting. Liquid to gas: Another phase change that can occur when matter loses heat energy is the transition from a liquid phase to a gas phase. This process is known as vaporization or boiling.
Phase change is the process where a substance changes from one state to another, such as solid to liquid. During phase change, thermal energy is absorbed or released without a change in temperature, as the energy is used to break or form intermolecular bonds. Heat energy is the transfer of thermal energy between objects due to a temperature difference, and it can cause phase changes by providing the energy needed to overcome intermolecular forces.
The energy absorbed by one gram of water as it changes from its liquid phase into water vapor is known as the heat of vaporization. This energy is used to overcome the intermolecular forces holding the water molecules together in the liquid phase.
Two phase changes that are endothermic or absorbing energy are melting (solid to liquid) and vaporization (liquid to gas). During these phase changes, energy is absorbed to break the intermolecular forces holding the particles together, allowing them to move more freely in their new state.
Condensation
The phase changes that involve a release of heat are those in which the particles move closer together. Thus, freezing is one phase change that involves a release of heat. The other such change is condensation.
2 phase changes that are exothermic are condensing and freezing.
Based on chemical properties exothermic phase changes are those that release energy. The exothermic phase changes are gas--> liquid, liquid --> solid, and gas--> solid. Looking at a phase diagram if you are going up the "stairs" the conversions require energy going down the "stairs" energy is released.
Phase changes requiring the addition of heat energy are the phase changes from solid to liquid, liquid to gas, and solid to gas. These phase changes are termed melting (solid to liquid), evaporation (liquid to gas), and sublimation (solid to gas).
When a substance changes from a liquid to a solid it releases energy. (You take the heat out)
It is converted to bond energy
Liquid to solid
Bond formation most often releases energy. but if other reactions or phase changes that release energy occur at the same time, bond formation can absorb energy.
Phase changes, such as melting or freezing, are not associated with a change in temperature. Instead, the energy associated with phase changes is used to break or form intermolecular forces between molecules.
It doesn't change notwithstanding heat energy changes.
The types of phase changes that require energy are melting (solid to liquid), sublimation (solid to gas), and evaporation (liquid to gas). These phase changes require energy input to break the intermolecular forces holding the particles together in a particular phase.