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For questions relating to the energy required for or produced by reactions, including questions of endothermicity/exothermicity, bond enthalpy, etc.

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What is the difference between enthalpy change and energy change? [closed]

I read about enthalpy change in my chemistry textbook which defines enthalpy change as the energy exchange between a chemical reaction and the surroundings at constant pressure. … My confusion came from when I read this BBC Bitesize page about energy change, can someone explain to me how they're different as they use the same units? …
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