Principle of Crystal hot water bagThe structure and principle of a liquid that turns into a liquid after boiling water, and the iron sheet will be crystallized and releasedWhy can other solutes with NaAc do?
Let's discuss our familiar bar! When the temperature is below, it is generally believed that the water must be solid - that is, ice. The idea is wrong! In fact, suspended in the air of pure...
The principle of the magic warm bag originally the principle of this warm bag is a phenomenon called undercooling.
To understand the principles of warm handbags, we first need to know what is supersaturated solution. At a certain temperature, the solubility of the solute in the solvent is unchanged. For example, the solubility of Nacl in water at room temperature is 36g/100mL water. When the concentration of the solution is equal to that of the solution, the solution is called a saturated solution. When the concentration of the solution is higher than that of the solution, the solution is called a supersaturated solution. The liquid in a warm bag is a supersaturated solution of sodium acetate (CH3COONa).
