Problem: Estimate the enthalpy of reaction, ΔH rxn°, for each of the following reactions using the information provided. Show all work and circle your final answers.H2 (g) + Cl2 (g) → 2 HCl (g)            ΔH°rxn = ?a. -461 kJb. -333 kJc. +201 kJd. +323 kJe. +492 kJ

FREE Expert Solution

For this problem, we have to calculate the enthalpy of reaction (ΔH) using the given bond enthalpies.

H2 (g) + Cl2 (g) → 2 HCl (g)          

Recall that the change of enthalpy for a chemical reaction (ΔH) can be calculated using bond energies:

H = ΣBEreactants - ΣBEproducts


To determine the enthalpy of reaction, we need to first see what bonds are present in the reactants and the products.

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Problem Details

Estimate the enthalpy of reaction, ΔH rxn°, for each of the following reactions using the information provided. Show all work and circle your final answers.

H2 (g) + Cl2 (g) → 2 HCl (g)            ΔH°rxn = ?

a. -461 kJ

b. -333 kJ

c. +201 kJ

d. +323 kJ

e. +492 kJ

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