Tag: matter in our surroundings

The kinetic energy of gases is maximum because inter-molecular force of attraction is minimum and kinetic energy is minimum in solid .

Solids have most number of particles per unit area. The molecules are very tightly packed and solids have high density.

Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process that is specified in some way. An example is latent heat of fusion for a phase change, melting, at a specified temperature and pressure. Latent heat is associated with the phase changes of atmospheric water vapor, mostly vaporization and sublimation.

The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. 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.

The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. 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.

Conduction, convection, radiation, all the 3 processes involves heat transfer.

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Conduction is the transfer of energy through matter from particle to particle. 

Sublimation- It is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. 

Condensation- It is the change of the physical state of matter from gas phase into liquid phase.

Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance.

Deposition is a thermodynamic process, a phase transition in which gas transforms into solid.

Melting (also known as fusion) is a physical process that results in the phase transition of a substance from a solid to a liquid.

Exothermic reactions release heat and light into their surroundings. For example, combustion reactions are usually exothermic. Endothermic reactions, on the other hand, absorb heat and/or light from their surroundings. For example, decomposition reactions are usually endothermic.

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. The latent heat of vaporization of water is the energy which is used to change the state of water (liquid) to vapor (gas).