Main difference – Boiling allude vs. Melting Point

Melting point and boiling point both define temperatures at which phase changes occur in substances. The main difference in between boiling suggest and melting point is that the melting suggest is characterized as the temperature at which solid and liquid phases space in equilibrium, vice versa, the boiling point is the temperature at which the vapour push of a liquid is same to the external pressure.

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Difference between Boiling allude and Melting allude – Melting and Boiling

What is melting Point

Melting allude is defined because that a substance together the temperature in ~ which the solid and also liquid phases can exist in equilibrium. The is at this temperature the a hard will start melting to end up being a liquid. At this temperature, the molecules creating the substance are gaining sufficient kinetic energy to get rid of the intermolecular pressures which host them in resolved positions and also they gain the capacity to move around. The freezing point describes the temperature at which a liquid deserve to start forming a solid. A substance can be supercooled below its freezing point without it creating a solid, so technically, melting and freezing point out are not the same. However, we deserve to assume them to be practically the exact same for a wide variety of cases.

What is boiling Point

Boiling point can be defined for a liquid as the temperature in ~ which its vapour press is same to outside pressure. At this temperature, the substance in fluid phase start the gas phase. If the exterior pressure is larger, climate it take away a higher temperature because that the vapour pressure to come to be equal come the external pressure. Consequently, the boiling allude is extremely dependent on exterior pressure. Because that instance, water can be boiled at much reduced temperatures once the outside pressure is lower (around 70o C at mountain Everest for example). The normal boil point is identified as the temperature in ~ which the vapour pressure of the liquid is equal to 1 atm, i.e. The temperature in ~ which liquid would boil when the exterior pressure is same to 1 atm.

Difference Between Boiling allude and melting Point

Definition of Boiling suggest and melting Point

Melting point is the temperature at which solid and also liquid phases the a substance room in equilibrium.

Boiling point is the temperature in ~ which its vapour pressure is same to the exterior pressure.

Phase Change

At the melting point, a solid becomes a liquid.

At the boiling point, a liquid becomes a gas.

Pressure Dependence

Melting point does not change with alters in the external pressure.

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Boiling point alters with transforms in the exterior pressure.

Image Courtesy:(Untitled) by Fotocitizen (Own work) , via Pixabay (modified)“Boiling Water” by Scott Akerman (Own work) , via flickr (modified)