Tag: chemistry

Matter has three main state of matter that is solid, liquid and gas. Vapour is the type of substance which forms when liquid converts into the gaseous phase. It is a matter but not a state of matter.

The inter-molecular force of attraction is very weak in case of gases. So, gases are highly fluid in nature.

In case of solid the inter-molecular force of attraction is very strong and inter-particle spaces are very small. So, it is very difficult to compress the solid.

Solids have highest force of attraction between particles. The molecules are very tightly packed.

Among all the states of matter, gases exert pressure in all directions. Liquids and solids exert pressure along the gravity (generally).

When an object absorbs heat the temperature of the object increases. For eg; on boiling water the temperature of water increases and vaporizes.

Gases are highly miscible as the molecules are loosely bounded and can easily mix with each other.

Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. This is because the gap between particles widens, while the particles themselves stay the same size.

The latent heat is used in change of states of matter, such as from solid to liquid or from liquid to gas without rising in temperature. When solid changes into liquid, the heat required for changing the state without rise in temperature is called the Latent Heat of Fusion. When liquid changes into gas because of rise in temperature, the heat required changing the state without rising in temperature is called the Latent Heat of vaporization.

A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light and therefore absorb the least heat.