Sugar dissolving in water is a physical change and not a chemical one. Chemical changes only occur when new substances form. Dissolving sugar in water does not cause a chemical reaction to take place.
When sugar dissolves in water, the sucrose molecules remain intact, making this is a physical change. However, when salt dissolves in water, the sodium ions separate from the chlorine ions, resulting in a chemical change. In both cases, evaporating the water from the solution returns the original substance. While the two processes look very similar, the changes occur as the solid dissolves is different, and the classification of the changes differs.Learn More
When water (a liquid) turns to steam (and escapes the tea kettle through a narrow hole, creating a whistling sound), it undergoes only a physical change. Water and steam are identical on a chemical level; both are made up of H20 molecules.Full Answer >
Sugar dissolves in water because both substances are polar substances. Water dissolves the majority of substances that are polar or ionic. The fact that sugar dissolves in water is unusual because most molecular compounds are nonpolar and are not water-soluble.Full Answer >
The Department of Physics at the University of Illinois states that sugar dissolves faster in hot water than in cold water because hot water gives sugar crystals energy. The hotter the water, the higher the energy, and the faster sugar crystals dissolve.Full Answer >
According to the Purdue University College of Science, sugar dissolves easily in water due to the fact that sucrose molecules are held together with weak intermolecular forces. The energy produced when these molecules bond with water is more than enough to offset the energy needed to break those bonds in the first place.Full Answer >