Which process is an example of a chemical change?
drying clothes in the dryer
chopping a tree
activating a glow stick
heating a cup of tea
Activating a glow stick is the example of a chemical change, as snapping one will cause a chemical reaction, causing the glow. All of the other options are physical changes because nothing new is formed. Hope this helps!
thank you
Activating a glow stick is an example of a chemical change.
To determine which process is an example of a chemical change, let's first understand what a chemical change is. A chemical change refers to a process during which one or more substances are transformed into entirely different substances with new chemical properties.
Now, let's analyze each process you mentioned to identify whether it involves a chemical change:
1. Drying clothes in the dryer: This process involves the removal of moisture from the clothes through heat and evaporation. While it does change the state of the clothes from wet to dry, it does not involve a chemical reaction. Therefore, it is not an example of a chemical change.
2. Chopping a tree: Although chopping a tree alters its physical form, it does not involve any chemical reactions or the formation of new substances. Hence, it is not an example of a chemical change.
3. Activating a glow stick: When you activate a glow stick, you typically bend it and mix two different substances (usually hydrogen peroxide and a fluorescent dye). As a result, a chemical reaction occurs, causing the glow stick to emit light. Therefore, the process of activating a glow stick is indeed an example of a chemical change.
4. Heating a cup of tea: Heating a cup of tea involves the transfer of thermal energy from a heat source to the liquid. This process changes the temperature of the tea but does not result in any chemical reactions or the formation of new substances. Hence, it is not an example of a chemical change.
In conclusion, the process of activating a glow stick is the only example among the provided options that involves a chemical change.