Melting point and boiling point

Thread starter Dragosagaragarwal
Start date Oct 8, 2016
Tags

Boiling Boiling point Melting Melting point Point

In summary, the melting point is the temperature at which a substance changes from a solid to a liquid state, while the boiling point is the temperature at which it changes from a liquid to a gas state. These points can be determined through various experimental methods and are important in chemistry for identifying and characterizing substances. The melting and boiling points of a substance are intrinsic properties that can be affected by factors such as pressure and purity. Additionally, the strength of intermolecular forces can impact the melting and boiling points, with stronger forces resulting in higher points.

Oct 8, 2016

Dragosagaragarwal

Why there is huge difference in M.P. and B.P. Of Oxygen (M.P. - 54K,B.P.- 90K) and sulphur (M.P. - 393 K, B.P. - 718 K)

Chemistry news on Phys.org

Oct 8, 2016

Bystander

Science Advisor

Homework Helper

Gold Member

Dragosagaragarwal said:

Why there is huge difference in M.P. and B.P. Of Oxygen (M.P. - 54K,B.P.- 90K) and sulphur (M.P. - 393 K, B.P. - 718 K)

S₆, S₈, S_n>>8 vs. O₂? Google "polymorphism."

1. What is the difference between melting point and boiling point?

The melting point of a substance is the temperature at which it changes from a solid to a liquid state, while the boiling point is the temperature at which it changes from a liquid to a gas state. In other words, the melting point is where a substance begins to melt, and the boiling point is where it begins to boil.

2. How are melting point and boiling point determined?

Melting point and boiling point can be determined through various experimental methods, such as heating the substance and measuring the temperature at which it changes state, or using specialized equipment like a melting point apparatus or a boiling point apparatus. The purity of the substance can also affect its melting and boiling points.

3. Why are melting point and boiling point important in chemistry?

Melting point and boiling point are important physical properties of substances that can provide valuable information about their chemical composition and purity. They can also be used to identify and characterize substances, as different substances have unique melting and boiling points.

4. Can the melting point and boiling point of a substance change?

The melting point and boiling point of a substance are intrinsic properties and do not change, unless the conditions (such as pressure or purity) also change. However, substances with impurities or mixed compounds may have a range of melting and boiling points rather than a specific value.

5. How do melting point and boiling point relate to the strength of intermolecular forces?

The strength of intermolecular forces, such as hydrogen bonding or London dispersion forces, can affect the melting and boiling points of a substance. Generally, the stronger the intermolecular forces, the higher the melting and boiling points will be, as more energy is required to break these forces and change the state of the substance.