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.
When water absorbs heat, it makes the individual water molecules vibrate faster. This is because heat is essentially evenly spread energy. If the molecules vibrate fast enough â¦ , they will be able to separate from each other and become a gas, which is what happens if the water evaporates and boils.hat happens to water molecules when water is heated? Like other molecules, water molecules, H2O (or H-O-H), move, vibrate and rotate in many ways at a temperature above absolute 0.