Apparently, this paper has been able to propose a reason for why hotter water freezes faster than colder water. I tested the hypothesis myself and found it to be true. Initially, the colder water froze partially while the hotter water was still liquid. As time progressed, the hotter water completely solidified while the colder water was still trying to freeze completely.
Based on these conclusions, I think hotter water is able to achieve a different “freezing rate” compared to the colder water. Initially, the colder water is able to achieve a higher value of “negative heat” while the hotter water starts at some origin. As time progresses, the colder water freezes at a linear rate while the hotter water freezes at increasing rate.
Hotter water is then able to achieve a point of negative heat faster than colder water. The reason for this, I think, is beacause with more heat, the water molecules are able to move at a much faster velocity in space, moving in random directions. As water is put in the freezer, the water molecules are put in order with the help of hydrogen bonding to form a well structured solid (ice). With more energy, water molecules are able to be put in a structure faster.
Another reason, that could coincide with the previous reason, is that equilibrium between water vapor and liquid allows a sufficient separation of gas and liquid, forming ice faster in the liquid and a top layer of ice forming on top. This was also observed in our experiment.
This experiment makes me think the Mpemba Effect to be true.
Some other questions I have:
1. How does the pH play a factor in freezing water?
2. If the above is true, Can the same be said about other molecules that hydrogen bond with each other?