Part A When 0 600 g Mn is combined with enough hydrochloric acid to make 100 0 m

Question

Part A When 0 600 g Mn is combined with enough hydrochloric acid to make 100 0 mL, of solution in a coffee-cup calorimeter, all of the Mn reacts, raising the temperature of the solution from 23.3 °Cto 29 5 "C the density is 1.00 g/mL) Express your answer using three significant figures. Manganese reacts with hydrochloric acid to produce manganese(II) chloride and hydrogen Ran(s) + 2HCI(aq) MnCl2(aq) + H2(g) exn for the reaction as written. (Assume that the specific heat capacity of the solution is 4.18 J/g C and You may want to reference ( 67 while completing this problem kJ

Explanation / Answer

no of mol of Mn = 0.6/55 = 0.011 mol

heat released(q) = m*s*DT

                 = 100*4.18*(29.5-23.3)

                 = 2.59 kj

DH0rxn = -q/n

        = -2.59/0.011

         = -2.35*10^2 kj/mol

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