Question

In: Chemistry

250 or more words please How do fireworks relate to chemistry?

250 or more words please

How do fireworks relate to chemistry?

Solutions

Expert Solution

Hi this general theory

Fire works are chemical reactions only.

Traditionally, gunpowder used in fireworks was made of 75 percent potassium nitrate (also called saltpeter) mixed with 15 percent charcoal and 10 percent sulfur; modern fireworks sometimes use other mixtures (such as sulfurless powder with extra potassium nitrate) or other chemicals instead.

Metal salts commonly used in firework displays include: strontium carbonate (red fireworks), calcium chloride (orange fireworks), sodium nitrate (yellow fireworks), barium chloride (green fireworks) and copper chloride (blue fireworks).

The sights and sounds of each explosion are the result of several chemical reactions – oxidations and reductions – taking place within the firework as it ascends into the sky. Oxidizers produce the oxygen gas required to burn the mixture of reducing agents and to excite the atoms of the light-emitting compounds. This is the part that starts the main part of the firework (the charge) burning and ignites other, smaller fuses that make the interesting, colorful parts of the firework (the effects) explode some time later. In a basic home firework, the main fuse consists of a piece of paper or fabric that you light with a match or cigarette lighter. In a complex public firework display, fuses are lit by electrical contacts known as wirebridge fuseheads. When the firework technician pushes a button, an electric current flows along a wire into the fusehead, making it burn briefly so it ignites the main fuse. Unlike manual ignition, electrical ignition can be done at a considerable distance, so it's much safer.

This is the general name for the top part of the firework containing the effect or effects (collectively known as the payload—much like the load in a space rocket). Sometimes the head has a pointed "nose cone" to make the firework faster and more aerodynamic and improve the chance of it going in a straight line, though many fireworks simply have a blunt end.


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