Everyday mixtures include sea water, minerals, soil, air, and many food items like soup or salad. These substances consist of two or more pure components blended together, each retaining its individual characteristics within the mixture.
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One example of a pure substance is elemental gold (Au). It consists solely of gold atoms, making it a homogeneous substance with uniform chemical properties throughout.
Milk contains various components such as water, fat, proteins, and minerals, making it a mixture rather than a pure substance. Each component retains its distinct chemical nature within the mixture.
A pure substance is one that consists of a single type of particle, with all constituent particles being identical in their chemical nature. It lacks any mixture or variation in its composition.
In science, “pure” refers to a substance composed entirely of particles with the same chemical nature. It indicates a homogeneous composition without any adulteration or mixture of different substances.
During evaporation, water molecules absorb heat energy from the surroundings, increasing their kinetic energy. As they gain enough energy, they break free from the liquid phase and enter the gaseous phase as vapor.
Wet clothes dry up through the process of evaporation, where water molecules on the fabric’s surface gain sufficient energy to escape into the air as vapor, removing moisture from the clothes.
When water is left uncovered, molecules at the surface continuously gain energy from the surroundings, gradually reaching the threshold for evaporation.
In both examples, water undergoes evaporation, where molecules at the surface gain enough kinetic energy to escape into the air as vapor.