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Which of the following conversion is correct when a firecracker burst?

  1. Potential energy is converted into light, sound and heat energy
  2. Heat energy is converted into light and sound energy
  3. Chemical energy is converted into light, sound and heat energy
  4. Transformation of energy has not been determined for fire cracker

Answer (Detailed Solution Below)

Option 3 : Chemical energy is converted into light, sound and heat energy
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Detailed Solution

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CONCEPT:

  • Conservation of energy: It states that the energy of an isolated system is conserved.
    • The energy can neither be created nor destroyed.
    • It only gets converted from one form of energy to another form.

EXPLANATION:

  • In the firecracker, the energy is stored in the form of chemical energy.
  • When we ignite the cracker, it bursts and we hear sound with some light.
  • So the chemical energy stored in the firecracker is converted into light, sound, and heat energy.
  • The total energy is conserved.
  • Hence the correct answer is option 3.
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