When Magnesium Reacts with Hydrochloric Acid,aqueous Magnesium Chloride and Hydrogen $\Delta$

question 93

Essay

When magnesium reacts with hydrochloric acid,aqueous magnesium chloride and hydrogen gas are produced.Suppose 0.120 g Mg react with the HCl in a 75.000 g acidic solution contained in a calorimeter.The temperature increases by 6.03°C.Calculate the $\Delta$ H_rxn of Mg with HCl in kJ/mol.Assume the specific heats of the solution and of the empty calorimeter are 4.18 J/(g . °C)and 64.4 J/°C,respectively.
Mg(s)+ 2 HCl( ) $\to$ MgCl₂(aq)+ H₂(g) $\quad$$\Delta$ H_rxn = ? kJ/mol

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