Column A

Question

Column A
1.
What is the total amount of energy needed to break the 4 O-H bonds in the 2 molecules of the reactant H2O?

:
What is the total amount of energy needed to break the 4 O-H bonds in the 2 molecules of the reactant H2O?

2.
What is the total amount of energy released when forming the 2 H-H bonds in 2 molecules of the product H2?

:
What is the total amount of energy released when forming the 2 H-H bonds in 2 molecules of the product H2?

3.
What is the total amount of energy released when forming the double O-O bond in the product O2?

:
What is the total amount of energy released when forming the double O-O bond in the product O2?

4.
What is the combined energy released for the product side of the equation? (Hint: add up the energies needed to form the bonds in O2 and H2).

:
What is the combined energy released for the product side of the equation? (Hint: add up the energies needed to form the bonds in O2 and H2).

5.
What is the total energy of the reaction? (Use the formula: Total bond energies of reactant - Total bond energies of products)

:
What is the total energy of the reaction? (Use the formula: Total bond energies of reactant - Total bond energies of products)

6.
Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic?:
Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic?
Column B
Column B
a.1,868 kJ/mol
b.864 kJ/mol
c.495 kJ/mol
d.1,359 kJ/mol
e.509 kJ/mol
f.Exothermic
g.Endothermic

Answer 1

a.1,868 kJ/mol
b.864 kJ/mol
c.495 kJ/mol
d.1,359 kJ/mol
e.509 kJ/mol
f.Exothermic
g.Endothermic