Each substance has a specific melting point (excepting cases of sublimation or thermal degradation).
melting point. :)
melting
A solid becomes a liquid when it temperature has reached its Melting Point (also called it Point of Fusion.)
When solids reach their melting points, they become liquids. This is the point at which the intermolecular forces holding the solid together are overcome, allowing the particles to move more freely and flow as a liquid.
as usual they become liquid
When energy is added to a solid, it can reach its melting point where it transitions from a solid to a liquid.
The boiling point refers to the temperature at which a substance transitions from a liquid to a gas phase. Solids do not have a boiling point, as they transition directly from a solid to a gas through a process called sublimation.
The freezing point and melting point of a substance are the same temperature, known as the equilibrium melting point, at which the solid and liquid phases coexist in equilibrium. When a substance is cooling down, it will reach its freezing point temperature, causing it to solidify. Conversely, when a substance is heating up, it will reach its melting point temperature, causing it to liquefy.
Boiling Point. Different substances reach this point at different pressures and temperatures.
the solid must reach its melting point which varies with every substance
No, for a liquid to become a gas it does not necessarily have to reach 100 degrees Celsius. The process by which a liquid changes to a gas is called evaporation and it can occur at temperatures below the boiling point of the liquid.
if you were to constantly increase the temperature of a solid you would eventually reach the melting point for that particular substance, at which time the solid would melt to a liquid. if you were to keep heating the substance, at some point the liquid would reach its boiling point and would evaporate to a gas.