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Working with heats of formation

Glucose reacts with oxygen to form carbon dioxide and water: If the heat of formation of glucose, carbon dioxide, and water are -1273.3 kJ mol-1, -393.5 kJ mol-1 and -285.8kJ mol-1. How many grams of glucose must react in order to release (1.00)(10^3)kJ of heat?

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Enthalpy of combustion of Glucose must be found out first.
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<br>dH = H(products) - H(reactants) = q(reaction )
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<br>here, C6H12O6(s) + 6O2(g) ----> 6CO2 + 6H2O ...

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