Question Use the information in the table to answer the question. Bond Bond Energy (kJ/mol) H–Cl 427 Cl–Cl 242 H–H 435 Hydrogen and chlorine gases react to produce hydrochloric acid according to the reaction. H2 + Cl2 → 2HCl How much total bond energy, in kJ/mol, is in the products of the reaction?
677 677 854 854 427 427 435
In the reaction, one H-H bond and one Cl-Cl bond are broken, and two H-Cl bonds are formed.
The total bond energy in the products can be calculated as follows:
Energy to break H-H bond: 435 kJ/mol
Energy to break Cl-Cl bond: 242 kJ/mol
Energy to form H-Cl bond (2 times): 427 kJ/mol
Total bond energy in products = (Energy to break H-H bond) + (Energy to break Cl-Cl bond) + (Energy to form H-Cl bond) x number of H-Cl bonds formed
= 435 kJ/mol + 242 kJ/smol + 427 kJ/mol x 2
= 677 kJ/mol + 854 kJ/mol
= 1531 kJ/mol
Therefore, the total bond energy in the products of the reaction is 1531 kJ/mol.
To determine the total bond energy in the products of the reaction, we need to consider the bond energies of the bonds broken and formed.
In the reaction, one H-H bond and one Cl-Cl bond are broken, while two H-Cl bonds are formed.
From the table, we can see that the bond energy for H-H is 435 kJ/mol and the bond energy for Cl-Cl is 242 kJ/mol.
To calculate the total bond energy in the products, we need to subtract the energy of the bonds broken from the energy of the bonds formed.
First, calculate the energy of the bonds broken:
1 H-H bond broken = 435 kJ/mol
1 Cl-Cl bond broken = 242 kJ/mol
Next, calculate the energy of the bonds formed:
2 H-Cl bonds formed = 2 * 427 kJ/mol = 854 kJ/mol
Finally, calculate the total bond energy in the products by subtracting the energy of the bonds broken from the energy of the bonds formed:
Total bond energy in the products = (Energy of bonds formed) - (Energy of bonds broken)
= 854 kJ/mol - (435 kJ/mol + 242 kJ/mol)
= 854 kJ/mol - 677 kJ/mol
= 177 kJ/mol
Therefore, the total bond energy in the products of the reaction is 177 kJ/mol.
To determine the total bond energy in the products of the reaction, we need to calculate the bond energy for each bond broken and formed.
First, let's calculate the bond energy for each bond broken:
1. Breaking the H-H bond requires 435 kJ/mol.
2. Breaking the Cl-Cl bond requires 242 kJ/mol.
Next, let's calculate the bond energy for each bond formed:
1. Forming two H-Cl bonds releases 2 × 427 kJ/mol.
To calculate the total bond energy, we add up the bond energies for the bonds broken and subtract the bond energies for the bonds formed:
Total bond energy = (Energy for bonds broken) - (Energy for bonds formed)
= (435 kJ/mol + 242 kJ/mol) - (2 × 427 kJ/mol)
= 677 kJ/mol.
Therefore, the total bond energy in the products of the reaction is 677 kJ/mol.