Why does the same-sized ice block, with identical specifications and weight, melt at different rates? Today, let's uncover the reasons behind this discrepancy.

For ice cubes, the duration of the freezing process significantly affects their quality. Therefore, the melting time of ice cubes is directly related to the freezing time. The shorter the freezing time, the faster the ice cubes will melt, as they are rapidly frozen over a short period. This results in a looser structure, causing the ice cubes to melt more quickly.

We understand that ice factories typically use two water sources for producing ice cubes. One source is river water, which, due to its high turbidity and concentration, freezes quickly, resulting in a faster ice-making process. However, the ice cubes made from river water are more porous and tend to melt faster.

An alternative water source is tap water, which is clearer and freezes slower than river water. The ice cubes made from tap water are also more solid, and they retain a higher coldness content. Consequently, the ice cubes produced with tap water have a longer melting time compared to those made from river water.

In summary, during the hot summer days, it's quite simple to differentiate between river ice and tap water ice. Just check the color of the ordered ice cubes. If the ice appears yellow and feels rough to the touch, it can be concluded that the ice source is from the river. If the ice is blue and transparent, and the surface feels smooth to the touch, then it's made from tap water.