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.
1 Freezing is the process that causes a substance to change from a liquid to a solid. 2  Freezing occurs when the molecules of a liquid slow down enough that their attractions cause them to arrange themselves into fixed positions as a solid.ome small drops of water may appear higher on the can where it is not as cold. Describe what happens to water molecules as they move from being water vapor near the can to ice on the can. Water vapor molecules in the air near the can cooled when energy from the air transferred to the cold can.