Is the boiling of water a chemical or physical change?
For example, a physical change does not result in the formation of new substances. Water boiling, melting ice, tearing paper, freezing water and crushing a can are all examples of physical changes. On the other hand, chemical changes are a bit different. In a chemical change, a new substance is formed.
Energy is needed to carry out processes, such as boiling water or burning candles. Heat is a total of kinetic energy of atoms, ions or molecules. When these chemical compounds are in motion due to kinetic energy they will warm up.
- The most interesting of these is the change in state, like the changes from solid to liquid to gas and back. There are many simple examples of physical changes, like melting ice (solid water) to liquid then boiling of water turning liquid to steam (gaseous water).
- Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed. For example, if wood is burned in a fireplace, there is not wood anymore but ash. Compare: Physical change - The opposite of a chemical change is a physical change.
- Some bronze objects tarnish to a dark brown color. Chemical properties can be identified by the changes they produce. The change of one substance into another substance is called a A piece of wood burning, an iron fence rusting, and a silver spoon tarnishing are all examples of chemical changes.
The most interesting of these is the change in state, like the changes from solid to liquid to gas and back. There are many simple examples of physical changes, like melting ice (solid water) to liquid then boiling of water turning liquid to steam (gaseous water).
- Also, since this was a physical change, the molecules in the can are still the same molecules. No chemical bonds were created or broken. Physical actions, such as changing temperature or pressure, can cause physical changes. No chemical changes took place when you melted the ice.
- Originally Answered: Is the boiling of an egg a physical change or chemical change? This is a chemical change, contrary to the prior answer. A chemical change is a process that cannot easily be reversed, as something about the subject was changed. However, there is no way to return a boiled egg to a raw egg.
- Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.
Updated: 2nd October 2019