Why is it that when hot water is poured in a glass with powder, it dissolves quickly but when cold water is poured, it formes clumps and doesn’t dissolve easily?
In: Chemistry
Start with ‘heat’, which is different that temperature. Heat is the motion energy of all the particles that make up a substance – in this case, water. The particles in a hot thing are moving much faster than the particles in a cold thing. In the water, all this extra motion will help push around the powder you are trying to dissolve, helping it to mix in more quickly.
The ability for a liquid solvent (such as water) to dissolve a solid solute (such as powder) depends, in part, on the temperature of the solvent. One simple way of thinking about it is: Heat = Energy; Energy = Motion of Atoms. The faster the atoms are moving (more energy/heat) the more space there is between them and this is the space that would accommodate the solid particles of the powder. More space = more powder dissolved.
Less heat = less energy = less speed = less space = less powder dissolved.
The answers given to your question are correct. To add : this is also why not water cleans better than cold.
Latest Answers