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

427
427

435
435

854
854

677
677

Answer 1

To determine the total bond energy in the products of the reaction \( \text{H}_2 + \text{Cl}_2 \rightarrow 2 \text{HCl} \), we need to consider the bonds in the products, which are 2 H-Cl bonds.

According to the table, the bond energy for each H-Cl bond is 427 kJ/mol. Since there are 2 H-Cl bonds in the products of the reaction (2 HCl), we need to multiply the bond energy of one H-Cl bond by 2:

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

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