Question

inc metal reacts with hydrochloric acid according to the following balanced equation: Zn(s)+2HCl(aq)→ ZnC l 2 (aq)+ H 2 (g) When 0.124 g of Zn(s) is combined with enough HCl to make 52.2 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 22.5 ∘ C to 24.2 ∘ C . Find ΔHrxn for this reaction as written. (Use 1.00 g/mL for the density of the solution and 4.18 J/(g⋅∘C) as the specific heat capacity.)?

Answer 1

Zn (s) + 2 He (ag) → Znel, (aq) + H₂ (g) heat mcAT Inf= lg - 52.29* H. 18 7 x ( 24.2-22.5°C) 3 70.93 J man moly of zu ma Molar mese 0.1249 65.38 g 1 nol 1. 896xlo - Ди ту; heat relesed mols of zn reactie - - 370.43x10 1-896x10 3 mol Alon = [- 195.6 ks/ mde of an