Energy is neither created nor destroyed in a chemical reactions.

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SUMMARY

Energy is conserved in chemical reactions, meaning it is neither created nor destroyed. The energy released during reactions originates from the chemical energy stored in atomic bonds. For instance, in the combustion reaction 2 H2 + O2 -> H2O, the breaking and reforming of bonds between hydrogen and oxygen molecules releases energy, which is crucial for applications such as propelling the space shuttle into orbit.

PREREQUISITES
  • Chemical bonding and molecular structure
  • Basic principles of thermodynamics
  • Understanding of combustion reactions
  • Knowledge of energy conservation laws
NEXT STEPS
  • Study the principles of thermodynamics in detail
  • Explore the mechanics of combustion reactions
  • Investigate the role of chemical energy in propulsion systems
  • Learn about energy transfer during chemical reactions
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Chemistry students, educators, aerospace engineers, and anyone interested in the principles of energy conservation in chemical processes.

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Energy is neither created nor destroyed in a chemical reactions. Explain where the energy released by the reactions comes from.
 
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Chemical energy exists in the bonds between atoms.

For example, consider a chemical reaction 2 H2 + O2 -> H2O. The bonds of H and O molecules break and reform to H-O bonds, and energy is released. This is an example of combustion - and this reaction is responsible for propelling the space shuttle into orbit.
 

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