What are chemical reactions involved in a firework display? Use gas laws to help explain.

Question
Fireworks are one of the most spectacular outdoor shows that everyone has enjoyed. They produce a wide variety of colors that take on many different shapes. The science of fireworks is a combination of art, physics, and chemistry, but how do they work? Watch the following video and address the questions below in your initial post.

The Chemistry of Fireworks. Accessed at https://www.youtube.com/watch?v=nPHegSulI_M on December 14, 2016.

What chemical reactions are involved in a firework display? Use gas laws to help explain.
What makes the chemical reaction so intense?
What is the product of this reaction?

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