Answer to Question #139854 in General Chemistry for Akim

Question

Calculate the energy change when hydrogen reacts with chlorine. H2+Cl2->2HCL H-H: 436, Cl-CL : 243, H-Cl: 432

Answer 1

∆H=∆H_products-∆H_reactants

∆H=2•∆H(HCl)-(∆H(H₂)+∆H(Cl₂))

∆H=2•432-436-243=185