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Enthalpy change of reaction definition

I have my chem mock tomorrow and while looking at past papers I came across the question: Define the enthalpy change of reaction. I checked the mark scheme but couldn't make sense of it.
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Ciara B.
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Original post by Ciara B.
I have my chem mock tomorrow and while looking at past papers I came across the question: Define the enthalpy change of reaction. I checked the mark scheme but couldn't make sense of it.
Ethalpy change of reaction is the enthalpy (energy) change when an amount of moles of a reactants are converted into products according to the given eq.
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Ciara B.
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Original post by Grizzelex
Ethalpy change of reaction is the enthalpy (energy) change when an amount of moles of a reactants are converted into products according to the given eq.

Thanks so much !!!
which past paper year is this?

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