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Energy changes G C S E triple science A Q A

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The document is about energy changes topic triple science TCSE chemistry AQA, the document explores about hydrogen fuel cells in detail also exploring pros and cons as well as bonds, energy and exothermic and endothermic energy.

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, Exothermic and Endothermic Reactions

Different chemicals store different amounts of energy in their bonds.

Exothermic Reactions

✨Exothermic reactions transfers energy
to the surrounding 🔥🔥(usually heat)

✨Combustion reactions (most common exo.
reaction) (fules are burnt in the presence
of oxygen)
Always draw
✨Neutralisation reactions (Acid+Base) the reactant
line 1st.
In this reaction a
✨Most oxidisation reactions
lot of energy has
Reaction profile been released to the
Reactants environment as
goes on the energy has reduced
top since it from the reactants
has more to the production
energy. which means surely
energy has been
Energy
released to the
environment.
Product goes
on the button
since it has less Reactant
energy. Product
Progress of the raction Energy

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Uploaded on
June 29, 2026
Number of pages
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Written in
2025/2026
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