Question: Given: H = - 1 2 7 k J m o l for MgO ( s ) + 2 H C l ( a q

Given:
H=-127kJmol for MgO(s)+2HCl(aq)MgCl2(aq)+H2O(l)
H?f=-601.7kJmol for Mg(s)+12O2(g)MgO(s)
H?f=-285.8kJmol for H2(g)+12O2(g)H2O(l)
H?f=0.00kJmol for Mg(s) and H2(g)
Calculate the H?rxn(in kJ) for
Mg(s)+2HCl(aq)MgCl2(aq)+H2(g)
Answer:
Given: H=-127kJmol for MgO(s)+2HCl(aq)MgCl2(aq)+H2O(l) H?f=-601.7kJmol for Mg(s)+12O2(g)MgO(s) H?f=-285.8kJmol for H2(g)+12O2(g)H2O(l) H?f=0.00kJmol

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