Solid to gas (sublimation) is endothermic (takes in heat).
In other words:
A phase change from the solid state to the gas state is endothermic.
Sublimation is endothermic (takes in energy).
Heat energy must be provided to make it work.
When there is a change of state from a solid to a liquid, a solid to a gas, or a liquid to a gas, at a constant temperature, the process is endothermic NOT exothermic. It requires energy to break the intermolecular forces that keep the molecules together, and that reduces the temperature - heat is taken in.
Burning a candle is an exothermic process because it releases heat energy. The chemical reaction between the wax and oxygen produces both light and heat, making it exothermic.
Freezing is exothermic, as the substance that is freezing loses energy to its surroundings.
Exothermic/endothermic is a process not a feeling.
endothermic reaction a positive enthalpy.
Both burning a log in a fireplace and burning gasoline in a car are examples of exothermic reactions. These reactions release energy in the form of heat and light as they occur. The heat and light produced during the combustion process are key to generating the energy needed to heat a room or propel a vehicle.
Exothermic
Burning petrol is an exothermic process. It releases heat and light as energy is given off during the combustion of petrol.
Burning a candle is an exothermic process because it releases heat energy. The chemical reaction between the wax and oxygen produces both light and heat, making it exothermic.
Freezing is exothermic, as the substance that is freezing loses energy to its surroundings.
Burning leaves is an exothermic process because it releases heat and light energy as a result of the chemical reactions that take place during combustion.
Exothermic/endothermic is a process not a feeling.
The burning of natural gas is an exothermic process.
It is an endothermic process.
endothermic
Dissociation is an endothermic process.
Fission is an exothermic process.
endothermic reaction a positive enthalpy.