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
According to Science Kids, things dissolve faster in hot water because the molecules in hot water move at a greater speed, bumping more frequently against the solute (the item being dissolved). The more frequent bumping against the solute causes it to dissolve quicker in the water.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 >
According to Business Insider, hot water, and therefore hot water pipes, freezes faster than cold water because of the Mpemba effect. Although it is not entirely understood why hot water freezes faster, scientists believe that the highly charged hydrogen bonds in water give it unique properties.Full Answer >
Both hot water and cold water have the ability to dissolve sugar molecules. However, hot water is able to dissolve higher quantities of sugar than cold water.Full Answer >