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# (ALSO ATTACHED) when magnesium reacts with hydrochloric acid, aqueous magnesium chloride and hydrogen gas are produced. Suppose .

Please help with this problem: (ALSO ATTACHED) when magnesium reacts with hydrochloric acid, aqueous magnesium chloride and hydrogen gas are produced. Suppose .120g Mg react with the HCl in 75 g acidic solution contained in a calorimeter. the temperature increases by 6.03. 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 64.6 J/C

Q = Ccal x delta T + m x Cp x dT Q = 64.4 x 6.03 + 75 x 4.18 x 6.03 Q = 2278.7 J... View the full answer

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Q = Ccal x delta T + m x Cp x dT
Q = 64.4 x 6.03 + 75 x 4.18 x 6.03
Q = 2278.7 J
since 0.12 g of Mg reacted it is 0.12/24.3 = 0.0049 moles
So 2278.7 J are released for 0.0049 moles of Mg so for 1...

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