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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.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoA phase change of gas to liquid, or from liquid to solid, both result in a release of energy. So would the more rare phase change of gas directly to solid.
Wiki User
∙ 11y agoGas to liquid, liquid to solid, gas to solid are all exothermic phase changes. They release heat.
Wiki User
∙ 13y agoWhenever you have to cool something down, you are releasing heat, so I would say the changes Freezing and Condensation release heat. :)
Wiki User
∙ 11y agoH2O(l) ----> H2O(s)
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Phase changes are not associated with a change in?
heat
When a substance changes from one phase to another what occurs?
Heat is transferred.
Does the rock cycle involve both chemical and physical changes?
yes because the cycle envolves heat.
What are the four main phase changes and how does heat affect their change?
The four main phase changes are... • Melting from solid to liquid • Evaporating from liquid to gas • freezing liquid to solid • condensation gas to liquid The first three obviously need heat! Not condensation though c:
When a substance changes from liquid to solid what is the energy?
The heat energy, or enthalpy, associated with a solid to liquid transition is the enthalpy of fusion and that associated with a solid to gas transition is the enthalpy of sublimation.
When you heat liquid and it change phase it become a?
When you heat a liquid and it changes phase it becomes a solid.
Do substances absorb or release heat energy as then change from a liquid to the solid phase?
When a substance changes from a liquid to a solid it releases energy. (You take the heat out)
Phase changes are not associated with a change in?
heat
When you heat a liquid and it changes phase it becomes?
a gas.
Which process involve the release of heat?
Condensation
What always accompanies a phase change?
Heat energy changes.
Temperature changes are those which do not involve the addition or subtraction of heat?
Adiabatic
What is unique about temperature during phase changes?
It doesn't change notwithstanding heat energy changes.
A combustion reaction will always involve the release of?
Heat
What phase changes require the addition of energy?
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 one phase to another what occurs?
Heat is transferred.
Which phase changes are endothermic?
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.
