Column A
1.
How much energy is need to break the Br-Br single bond in Br2?
2.
How much energy is need to break the H-H single bond in H2?
3.
What is the combined energy absorbed for the reactant side of the equation? (Hint: add up the energies needed to break the bonds in H2 and Br2)
4.
What is the total amount of energy released when forming the 2 H-Br bonds of the product?
5.
What is the total energy of the reaction? (Use the formula: Total bond energies of reactants - Total bond energies of products)
6.
Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic?
match with
Column B
a.
193 kJ/mol
b.
628 kJ/mol
c.Exothermic
d.Endothermic
e.732 kJ/mol
f.435 kJ/mol
g.-104 kJ/mol
Column A
1. How much energy is needed to break the Br-Br single bond in Br2? - a. 193 kJ/mol
2. How much energy is needed to break the H-H single bond in H2? - a. 193 kJ/mol
3. What is the combined energy absorbed for the reactant side of the equation? (Hint: add up the energies needed to break the bonds in H2 and Br2) - e. 732 kJ/mol
4. What is the total amount of energy released when forming the 2 H-Br bonds of the product? - f. 435 kJ/mol
5. What is the total energy of the reaction? (Use the formula: Total bond energies of reactants - Total bond energies of products) - g. -104 kJ/mol
6. Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic? - c. Exothermic