Changing a substance from solid into a liquid is called a change of state or a change of phase. Melting is the name given to the change of state from a solid to a liquid.
Water will change from a solid to a liquid at 0°C at standard atmospheric pressure of 760 mm of mercury.
The three phases of water are, liquid, solid and gas. Water changes from liquid to solid by Freezing. It changes from liquid to gas by Evaporation. It changes from solid to gas by Sublimation. It changes from solid to liquid by Melting. It changes from gas to liquid by Condensation.
The density of water decreases as it freezes and transitions from liquid to solid. This is because the molecules arrange themselves in a more spread-out, less dense pattern as ice compared to when they are in liquid form.
Going from gas phase directly to solid state will conserve maximum energy. Just the opposite of the statement above will be true for maximum energy release. Changing from solid to directly into gas is called sublimation.
One way to change water from a liquid to a solid is by lowering its temperature below 0 degrees Celsius. This process is known as freezing, where water molecules slow down and come closer together to form a solid structure, ice.
When water freezes it changes from a liquid to a solid. When water boils or evaporates it changes from a liquid to a gas.
What type of change occurs when water changes from a solid to a liquid
take some ice (a solid) and melt it into water (a liquid)
In the case of water (liquid) you would freeze it into ice (solid).
The change of state is Melting. Solid to liquid is melting. E.g. ice to water
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.
To change liquid water into a solid, you need to lower the temperature below 0 degrees Celsius to freeze it. To change liquid water into a gas, you need to raise the temperature above 100 degrees Celsius to evaporate it.
you freeze it.
Let's consider the case of ice. Ice is a solid. When heated, it gets transformed to water. Water is a liquid. Further heating changes water into gas. Thus, heat can change a solid into both liquid and solid form.
Heat is added to a solid to make a liquid... this is called melting. some additional liquid (water,ethanol,acid…) also change solid into a liquid.
Frost is a phase change of a gas to a solid (deposition). Water vapor turns directly to ice.
Melting solid ice into liquid water is a physical change. It involves a phase change from solid to liquid without altering the chemical composition of water molecules.