Question
The endothermic decomposition of magnesium oxide is described in the chemical equation below.
 
2MgO(s)→2Mg(s) + O2(g)
∆H0= +1203 kJ
Calculate the enthalpy change (in kJ) for the combustion of 6.54 g of elemental magnesium with elemental oxygen? 

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Chemical Thermodynamics

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