How did the first peoples know which foods were safe to eat? Excellent question! Food historians make educated guesses based on ancient records and modern practices.
When water freezes its entropy decreases. This does not violate the second law of thermodynamics. The second law does not say that entropy can never decrease anywhere. It just says that the total entropy of the universe can never decrease.he entropy increases whenever heat flows from a hot object to a cold object. It increases when ice melts, water is heated, water boils, water evaporates. The entropy increases when a gas flows from a container under high pressure into a region of lower pressure.
Freezing is also exothermic, and the entropy of the surroundings will increase. The equation for the entropy of the surrounding is the opposite the heat of the reaction which during a phase change, which is at equilibrium so the process is reversible.This means that the entropy of the surroundings will increase.here is the system, which is the water freezing. There is the surroundings, which I just discussed, which is the environment of the reaction, all of the universe except the reaction. Then there is the entropy of the universe, which is always increasing.