Question

What is the change in enthalpy (in kJ mol⁻¹) for the following reaction

Cl₂(g) + 2BrF₅(g) ⇄ 2BrCl(g) + 5F₂(g)
1) -185 kJmol⁻¹
2) 185 kJmol⁻¹
3) -213 kJmol⁻¹
4) 213 kJmol⁻¹
5) 92.68 kJmol⁻¹

Answer 1

Without specific enthalpy values for the involved compounds or reference to a standard enthalpy table for the reaction of Cl2(g) with BrF5(g). Hence, the correct answer is option 1).

Step-by-step explanation:

The change in enthalpy (ΔH) for a chemical reaction is the heat absorbed or released during the reaction. To determine ΔH for a given reaction, you would typically sum the enthalpies of formation for the products and subtract the sum of the enthalpies of formation for the reactants.

However, in the question provided, specific enthalpy values for the formation of BrCl(g) and F₂(g) are not given, nor is a reference to a standard enthalpy table or data for the reaction between Cl₂(g) and BrF₅(g) presented. Without additional data, we cannot accurately determine the enthalpy change for the reaction Cl₂(g) + 2BrF₅(g) ⇌ 2BrCl(g) + 5F₂(g).