is a phase change a chemical change?
67950
You added enough energy to create a phase change from solid to liquid. Physical actions, such as changing temperature or pressure, can cause physical changes. No chemical changes took place when you melted the ice. The water molecules are still water molecules.
792733
Chemical change is when water is transformed into hydrogen gas and oxygen gas. ... While chemical change is when you have a substance that gets transformed into 1 or more different substances. So melting the ice will make it go back to water, melting iron will make it liquid iron … Thus, melting is a physical change.
535736
Melting and burning of candle wax is an example of both physical and chemical changes. Answer: Burning of wood is a example of both physical and chemical change. When wood is burnt the moisture present in it turns to vapour ,it is a physical change while it burns and generate CO2 is a chemical change.
303334
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
171271
Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
927931
The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.
67100
Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
798556
Physical changes are usually about physical states of matter. Chemical changes happen on a molecular level when you have two or more molecules that interact. Chemical changes happen when atomic bonds are broken or created during chemical reactions.
465855
Physical and chemical changes are similar because both processes result in something that looks different after the change.
942456
Both: They both invlove changes in the state of matter. They both have energy changes. There are new things made either way, no matter if the chemical composition is changed or not.
291979
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. ... Contrast this with a chemical change, in which chemical bonds are broken or formed so that the starting and ending materials are chemically different. Most chemical changes are irreversible.
1210522
17. An example of a chemical change is when water freezes. 18. When platinum is heated, then cooled to its original state, we say this is a physical change.
1270469
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely new substance with a new chemical formula.
465662
There is no effect on the chemical identity of the substance. For example, water remains water, no matter if it solid, liquid or gas. By the way, all phase changes include sublimation (solid to gas) and deposition (gas to solid). ... This change in no way affects the chemical identity of the element.
1020874
In a physical change, one or more a of substance's physical properties – its size, shape, color, or state (phase) of matter – is altered. ... A chemical change results in the formation of one or more new substances. The new substances differ in chemical properties and composition from the original substance.
1414571
melting of wax is a physical change but burning of a candle is a chemical change.
1159153
Substances can change phase—often because of a temperature change. At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting.