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Mg + 2HCl -> MgCl2 +H2 delta H = ?

MgO + 2HCl (aq) -> MgCl2+ H2O delta H = ?
H2+ 1/2O2 -> H2O delta H = -285.8 kJ

Using Hess' Law find both the missing delta H values.

1 answer

Mg + 2HCl -> MgCl2 +H2: delta H = -571.6 kJ
MgO + 2HCl (aq) -> MgCl2+ H2O: delta H = -857.4 kJ
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