what do you
observe when fireworks explode? Is anything new formed? What type of change it is?
Answers
Answer:
When you look at the fireworks, you see dazzling sparkles of red, white and blue trickle down in all directions. The explosion of fireworks is an example of chemical change. During a chemical change, substances are changed into different substances. Another words, the composition of the substance changes.
Answer:
A lifting charge of gunpowder is present below the shell with a fuse attached to it. When this fuse, called a fast-acting fuse, is ignited with a flame or a spark, the gunpowder explodes, creating lots of heat and gas that cause a buildup of pressure beneath the shell.
The amazing colors in exploding fireworks come from chemical reactions triggered by heat. Combustion propels fireworks into the air while oxidization provides the oxygen needed to excite the metal compounds in fireworks.
Fireworks are the result of chemical reactions involving a few key components -- like a fuel source (often charcoal-based black powder), an oxidizer (compounds like nitrates, chlorates that produce oxygen) and a color-producing chemical mixture. The oxidizer breaks down the chemical bonds in the fuel, releasing energy.