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The boiling point is the temperature at which the vapor pressure of the liquid is equal to the external pressure. It is also the condensation point.

The freezing point is the temperature at which liquid and solid coexist in equilibrium. It is also the melting point.

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Are melting and boiling points of a substance the same?

The melting and boiling points of a substance (in this case I am assuming you are referring to a pure substance, and not a mixture), are the same. The triple point is defined by the temperature and pressure at which solid, liquid, and vapor of a substance, can coexist in equilibrium. At any pressure below the triple point, only sublimation and condensation are possible (no liquid phase is possible). Between the triple point pressure and the critical point pressure, there is a difference between the melting and boiling points, of a substance. The melting point temperature will be lower than the boiling point. At the critical point, the densities of the liquid and vapor phases, have merged, and boiling no longer occurs. At and above the critical point, you cease to get liquid and vapor, but you get what is referred to as a "supercritical fluid".


For any pure substance the boiling point and melting point will always remain?

The melting point and the boiling point of a substance are physical characteristics for each substance and are unchanged at the same pressure.


What is the substances melting point the same as?

A substance's melting point is the temperature at which it changes from a solid to a liquid state. It is unique to each substance and does not necessarily match the melting point of any other substance.


Do all substances have their own boiling point and freezing point?

Yes, all substances have unique boiling and freezing points that are determined by their chemical composition and properties. These points represent the temperature at which a substance changes its state from liquid to gas (boiling point) or from liquid to solid (freezing point).


Isobutane melting point and boiling point?

Butanone boils (at StP) at 79.64 °C and melts at -86 °CBy the way: the naming of butanone (CH3COCH2CH3) is not 2-butanone, because 3-butanone is the same compound and 1-butanone does not exist: this is butanal.

Related Questions

Is melting point the same as its boiling point?

No. The boiling point is higher temp. than the melting point. When something is melted, it becomes liquid: when something is boiled, it begins to become vapor.


Is boiling point is always same as the melting point?

No, the boiling point and the melting point are not always the same. The boiling point is the temperature at which a substance changes from a liquid to a gas, while the melting point is the temperature at which a substance changes from a solid to a liquid.


Is freezing boiling or melting most affected by pressure?

Boiling point is most affected by pressure. Note that freezing point and melting point are in fact the same.


Is boiling point higher than melting point?

The boiling point is typically higher than the melting point for a substance. The boiling point is the temperature at which a substance transitions from a liquid to a gas, while the melting point is the temperature at which a substance transitions from a solid to a liquid.


How can information about the melting point and boiling point of matter help you know its states?

If the temperature is below the melting point, you know it is in the solid state. If the temperature is below the boiling point, and above the melting point, you know it is a liquid. If the temperature is above the boiling point, you know it is a gas, etc. (Note: melting point is the same as freezing point).


Are melting and boiling points of a substance the same?

The melting and boiling points of a substance (in this case I am assuming you are referring to a pure substance, and not a mixture), are the same. The triple point is defined by the temperature and pressure at which solid, liquid, and vapor of a substance, can coexist in equilibrium. At any pressure below the triple point, only sublimation and condensation are possible (no liquid phase is possible). Between the triple point pressure and the critical point pressure, there is a difference between the melting and boiling points, of a substance. The melting point temperature will be lower than the boiling point. At the critical point, the densities of the liquid and vapor phases, have merged, and boiling no longer occurs. At and above the critical point, you cease to get liquid and vapor, but you get what is referred to as a "supercritical fluid".


Why is the melting and boiling point of carbon dioxide the same -78degree?

They aren't the same. The boiling point of carbon dioxide is -57 oC. (Wikipedia)


What are the boiling and melting points of Yttrium?

The boiling point of Yttrium is 3609 K (3336oC or 6037oF). (3336 °C, 6037 °F)


Is the boiling point the same as the melting point?

No, boiling point is not the same as melting point. Boiling point is the point at which a liquid begins to become a gas. (Water begins to become water vapor at about 212 degrees fahrenheit, or 100 celsius) Melting point is the point at which a sold begins to become a solid. (Ice begins to become water at about 32 degrees fahrenheit, or 0 degrees celsius)


Do all liquids have the same boiling and melting point?

No, different liquids have different boiling and melting points depending on their chemical composition. The boiling point is the temperature at which a liquid turns into a gas, while the melting point is the temperature at which a solid turns into a liquid. Each liquid has its own unique set of physical properties that determine its specific boiling and melting points.


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

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.


Short difference between melting and boiling point?

Melting point is the temperature at which a substance changes from solid to liquid state, while boiling point is the temperature at which a substance changes from liquid to gas state. Melting occurs when the intermolecular forces holding solids together are overcome, whereas boiling involves the breaking of intermolecular forces within the liquid to form a gas.