Question

3 Hydrogen and chlorine react to form hydrogen chloride gas, as shown in the equation. H2 + Cl2 ? 2HCl This equation can be represented as shown. H-H + Cl-Cl ? 2H-Cl Some bond energies are shown in the table. bond | bond energy in kJ/mol ---|--- H-H | 436 Cl-Cl | 243 H-Cl | 432 Calculate the energy change for the reaction between hydrogen and chlorine, using the following steps. - Calculate the energy needed to break the bonds. kJ - Calculate the energy released when bonds are formed. kJ - Calculate the energy change for the reaction. kJ/mol

          3 Hydrogen and chlorine react to form hydrogen chloride gas, as shown in the equation.

H2 + Cl2 ? 2HCl

This equation can be represented as shown.

H-H + Cl-Cl ? 2H-Cl

Some bond energies are shown in the table.

bond | bond energy in kJ/mol
---|---
H-H | 436
Cl-Cl | 243
H-Cl | 432

Calculate the energy change for the reaction between hydrogen and chlorine, using the following steps.

- Calculate the energy needed to break the bonds.
kJ

- Calculate the energy released when bonds are formed.
kJ

- Calculate the energy change for the reaction.
kJ/mol

3 Hydrogen and chlorine react to form hydrogen chloride gas, as shown in the equation.

H2 + Cl2 ? 2HCl

This equation can be represented as shown.

H-H + Cl-Cl ? 2H-Cl

Some bond energies are shown in the table.

bond | bond energy in kJ/mol
—|—
H-H | 436
Cl-Cl | 243
H-Cl | 432

Calculate the energy change for the reaction between hydrogen and chlorine, using the following steps.

- Calculate the energy needed to break the bonds.
kJ

- Calculate the energy released when bonds are formed.
kJ

- Calculate the energy change for the reaction.
kJ/mol

Added by Lumi S.

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