Solution

Solution is some solutes dissolve in solvent uniformly. Knowing solution better is extremely important for people in chemistry filed. After all, most of experiments are happened in solution and the properties of solution will influence researcher's outcome.

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For example, if we measure the enthalpy of a certain reaction. (Definition of Enthalpy ) We should exclude the heat change happened in dissolved process, because it is not account for the heat transfer of reaction. So, to eliminate it, we cannot use the solution that just dissolved. We should wait for a moment to make sure the solution is cool down. The reason why the solute dissolve will generate the heat is because of the intermolecular forces. The energy of intermolecular forces is much less than chemical bond, but it still store some energies. So, when the substances dissolve in solvent, the forces between solute and solute need absorbs energy to push each substances away and the new intermolecular bond between solute and solvent will need release energy to form. The total energy will depend on this 2 process. So for some dissolutions, absorbed energy may more than released energy and other then vice versa.

Another interesting phenomenon is that some certain solution have unique color. It is really easy for people to differentiate the different solutions when people do not know what the solution is.

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