Zinc metal reats with hydrochloric acid according to the equation:Zn(s) + 2HCl(a

Question

Zinc metal reats with hydrochloric acid according to the equation:Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g).When 0.103 g of Zinc is combined with 50.0 mL hydrochloric acid in a coffee-cup calorimeter, the initial temperature of 22.5 deg C increses to a maximum of 23.7 deg C. Assuming the density of the solution is 1.00 g/mL and its specific heat is 4.184 J/(g.deg C). Calculate the delta H for the reaction per mole of Zinc. You must show work or include as much explanation as needed for this calculation. If you give just the final answer you will not get the full credit. Round off your answer to correct number of sig. fig. Zinc metal reats with hydrochloric acid according to the equation:Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g).When 0.103 g of Zinc is combined with 50.0 mL hydrochloric acid in a coffee-cup calorimeter, the initial temperature of 22.5 deg C increses to a maximum of 23.7 deg C. Assuming the density of the solution is 1.00 g/mL and its specific heat is 4.184 J/(g.deg C). Calculate the delta H for the reaction per mole of Zinc. You must show work or include as much explanation as needed for this calculation. If you give just the final answer you will not get the full credit. Round off your answer to correct number of sig. fig.

Explanation / Answer

Delta H = m* s* Delta T

m= 50*1g/ml = 50

s 4.184J/g/deg C

Temp Change= 23.7-22.5 = 1.2 degree C

Delta H = 50 * 4.184*1.2= 251.04 J

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