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
a.495 kJ/mol
b.Exothermic
c.1,359 kJ/mol
d.509 kJ/mol
e.864 kJ/mol
f.Endothermic
g.1,868 kJ/mol
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? - 864 kJ/mol
2. What is the total amount of energy released when forming the 2 H-H bonds in 2 molecules of the product H2? - 495 kJ/mol
3. What is the total amount of energy released when forming the double O-O bond in the product O2? - 498 kJ/mol
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). - 993 kJ/mol
5. What is the total energy of the reaction? (Use the formula: Total bond energies of reactant - Total bond energies of products) - 366 kJ/mol
6. Based on the value of the total energy of the reaction, is this reaction endothermic or exothermic? - Exothermic
Column B
a. 495 kJ/mol
b. Exothermic
c. 1,359 kJ/mol
d. 509 kJ/mol
e. 864 kJ/mol
f. Endothermic
g. 1,868 kJ/mol