The same amount of energy that is required to change it from a solid to a liquid. About 334.0 kJ/kg.
Physical change can occur when energy is added or removed. For example, adding heat energy can cause water to change from a solid to a liquid (melting), while removing heat energy can cause water to change from a liquid to a solid (freezing). These changes do not alter the chemical composition of the substance.
If enough energy is taken away from water vapour, it will condense to form water (in liquid form). This is because a gaseous state requires more energy than a liquid state (and a liquid state requires more energy than a solid state).
Water requires a lot of energy to change its phase because of its strong hydrogen bonds. When heating water, energy is needed to break these bonds so that the water molecules can move more freely from a solid to a liquid or a liquid to a gas. Similarly, when cooling water, energy is released as the water molecules form more stable hydrogen bonds in the solid or liquid state.
You can change both of these by increasing or decreasing the speed of the molecules (kinetic energy), or by increasing or decreasing the heat applied (thermal energy). If you want to melt ice, you can increase the kinetic energy by increasing the thermal energy. The opposite occurs if you want to freeze water.
The term is "latent heat." It represents the energy absorbed or released by a substance during a phase change, such as when water changes from a liquid to a solid or a gas.
The thermal energy of the water increases as it melts, changing from a solid (ice) to liquid water. For a solid to melt, it is necessary for it to absorb energy from its surroundings.
The thermal energy of the water increases as it melts, changing from a solid (ice) to liquid water. For a solid to melt, it is necessary for it to absorb energy from its surroundings.
The thermal energy of the water increases as it melts, changing from a solid (ice) to liquid water. For a solid to melt, it is necessary for it to absorb energy from its surroundings.
The freezing point of water is 0 C (32 F). The difference between a liquid and a solid is the space between the atoms. To become more dense (a solid) the orbit of the electrons has to become less. This requires losing energy. As energy cannot be made or destroyed, it has to be transferred. This removal of energy is the removal of heat.
the state change is from liquid to solid and the energy change is cold energy to heat energy
Physical change can occur when energy is added or removed. For example, adding heat energy can cause water to change from a solid to a liquid (melting), while removing heat energy can cause water to change from a liquid to a solid (freezing). These changes do not alter the chemical composition of the substance.
Their speed - Kinetic Energy - increases as the solid melts.
Energy because energy can be used as heat.
Melt.
Water changes to a solid, ice, when heat is taken away from it. You can think of putting water into the freezer. Since the freezer is cold, heat flows out of the water making it become ice cubes.
From liquid water change to solid: freezing.From liquid water change to gaseous: vaporization.From solid water change to liquid: melting.From solid water change to gaseous: sublimation.
Energy is used when water changes from a solid to a liquid.