Zinc metal reacts with hydrochloric acid according to the following balanced equation.
Zn(s)+2HCl(aq)?ZnCl2(aq)+H2(g)
When 0.128g of Zn(s) is combined with enough HCl to make 52.4mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 22.0?C to 24.2?C.
Part A
Find ?Hrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g??C as the specific heat capacity.)
