Children, even those that are vaccinated, may develop rotavirus disease more than once. That is because neither natural infection with rotavirus nor rotavirus vaccination provides full immunity (protection) from future infections. Usually a personâs first infection with rotavirus causes the most severe symptoms.
Because molecules move quicker at higher temperature, causing them to collides more. Since they collides more, reaction occurs to be a lot faster to. And that's why things dissolve quicker in hot water than in room temperature water.
Key Concepts. 1  Heating a liquid increases the speed of the molecules. 2  An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. 3  Cooling a liquid decreases the speed of the molecules.sing what you know about the attractions between water molecules and the way heating affects molecular motion, explain why the volume of water in the cylinder increases when it is heated. Students should realize that the molecules in hot water move slightly further apart, accounting for the increased volume.