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.Know More
Sugar crystals dissolve faster in hot water because hot water breaks down the tight, low-energy molecules of sugar. Sugar crystal molecules are held together by rigid bonds, meaning their energy is low. In order for those bonds to break up, the molecule needs more energy. Hot water, on the other hand, has a lot of energy as its molecules bounce around its container. When sugar is added to hot water, the molecules of the sugar are relaxed and broken down within the water.
There is a point where the sugar-to-water ratio is too high and the water is over-saturated by the sugar. In such a case, the sugar that is not broken down will remain in crystal form and fall to the bottom of the container, even if the water's temperature is quite high. If a container of hot water and sugar is left out to cool down, some sugar molecules will gather back together and reform sugar crystals.Learn more about Solutions & Mixtures
Salt, as well as any other soluble substance, dissolves quicker in hot water because heat makes the water molecules move faster, creating more space between them. This extra space means the salt molecules more readily make contact with the water molecules, binding to them and creating a solution.Full Answer >
Sugar dissolves more quickly in hot water because the water molecules are moving at a higher rate of speed and break down the sugar more quickly. The hot water contains more kinetic energy, and the more mobile water makes the sucrose molecules in the sugar move faster as well.Full Answer >
Water temperature affects the rate at which sugar dissolves. Sugar dissolves faster in warmer water than it does in cooler water. Two things are required for a substance to dissolve and create a solution: the substance itself, or the solute, and the substance it is dissolving into, or the solvent.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 >