Question

Use the information in the table to answer the question.

Bond Between Atoms and Their Respective Electronegativity
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?

(1 point)
Responses

435
435

427
427

854
854

677

Answer 1

To find the total bond energy in the products of the reaction \(H_2 + Cl_2 \rightarrow 2HCl\), we first need to consider the bonds that are formed in the products.

In the reaction, each molecule of hydrochloric acid (HCl) contains one H–Cl bond. Since the reaction produces 2 molecules of HCl, we have 2 H–Cl bonds.

From the table, the bond energy for the H–Cl bond is 427 kJ/mol.

Now we calculate the total bond energy in the products:

\[
\text{Total bond energy} = \text{Number of H–Cl bonds} \times \text{Bond energy of H–Cl}
\]

\[
\text{Total bond energy} = 2 \times 427 \, \text{kJ/mol} = 854 \, \text{kJ/mol}
\]

Thus, the total bond energy in the products of the reaction is **854 kJ/mol**.