Question

Name: Quiz 9 CHE 1030 1. Using the following bond energies Bond Energy (kJ/mol) 839 413 495 799 467 Bond C-H O-0 C-O O-H estimate the heat of combustion for 1 mol of acetylene: C2H2(g)+ O2(g) → 2CO2(g)+H2O(g) 2. Using the following data reactions: H2(g) + Cl2(g) → 2HCl(g) H2(g) → 2H(g) Cl2(g) 2CIg) AP (kJ) -184 432 239 calculate the energy of an H-Cl bond.

Answer 1

1)enery of products-energy of reactants

(2*799)+467-{ 839 +(2*413)+(2.5*495)}

enrgy of formation is -837.5

2)similarly

product-reactants=energy of formation

products =energy of formation +reactanats

solving we get HCL bond enegy is 487