If a substance is dissolved in water, and the temperature of the surroundings decreases, then this process is endothermic.
The expression endothermic processes make reference to chemical reactions capable of increasing the internal energy of the closed system.
These type of chemical reactions (endothermic processes) are associated with the enthalpy of the matter.
In conclusion, if a substance is dissolved in water, and the temperature of the surroundings decreases, then this process is endothermic.
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