Why are the melting point and boiling point of the same matter different?

Answer 1

Boiling point is the temperature at which a substance turns into a gas, while melting point is the temperature at which a substance turns into a liquid state from a solid state. The boiling point is always a higher temperature then the melting point. The melting point has a substance turn into a liquid from solid, and boiling point has a liquid turn into a gas.

Answer 2

"Boiling point" is the temperature, at some given pressure, at which

a substance exists in both the liquid and gaseous states.

Example: 212°F at standard air pressure, for water.

"Melting point" is the temperature, at some given pressure, at which

a substance exists in both the solid and liquid states.

Example: 32°F at standard air pressure, for water.

Answer 3

The melting point is the temperature at which a solid becomes a liquid; moving in the other direction, if a liquid becomes a solid that is called the freezing point. The boiling point is the temperature at which a liquid becomes a gas. If the melting point and the boiling point at the same, that would mean that this particular substance has no liquid phase, and will change directly from a solid to a gas. Carbon dioxide has that property, it has no liquid phase at normal air pressure. The process of changing from a solid to a gas without going through a liquid phase is called sublimation.

Answer 4

The difference is the melting point is melting something like ice and the boiling point is

boiling something like water.

Answer 5

Melting point goes from solid to liquid. Boiling point goes from liquid to gas. Melting point and freezing point are the same.

Answer 6

Melting point: the temperature of change from solid to liquid phase.

Boiling point: the temperature of change from liquid to gas phase.