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Use Hess' law to get ΔH3 for reaction (3) below from the experimental ΔH1 and ΔH2entered...

Use Hess' law to get ΔH3 for reaction (3) below from the experimental ΔH1 and ΔH2entered immediately above. (This ΔH3 is based on your experimental data in (1) and (2) above.) Show calculations.

Mg(s) + 2 HCl(aq) ----> MgCl2(aq) + H2(g)   ΔH1= 1862.0

MgO(s) + 2 HCl(aq) ---> MgCl2(aq) + H2O(l) ΔH2=751.34

Mg(s) + H2O(l)  MgO(s) + H2(g)   ΔH3=?

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