Answer:The delta H (ΔH) is the symbol used to represent the change in enthalpy of a chemical reaction. It indicates whether a reaction releases or absorbs heat. In this case, you are asked to determine the ΔH in kJ/mol for the reaction:
UCl2 + Cl2 → UCl5
To calculate the ΔH, you need to know the enthalpy values of the reactants and products involved in the reaction. Unfortunately, these values are not provided in the question. Enthalpy values can be determined experimentally or obtained from reliable sources such as reference books or databases.
Once you have the enthalpy values, the ΔH can be calculated using the following equation:
ΔH = Σ(Hf products) - Σ(Hf reactants)
In this equation, Σ(Hf products) represents the sum of the enthalpies of formation for the products, and Σ(Hf reactants) represents the sum of the enthalpies of formation for the reactants.
Without the specific enthalpy values for UCl2, Cl2, and UCl5, it is not possible to calculate the ΔH for this reaction. To obtain the enthalpy values, you may need to consult a reliable source or perform experimental measurements.
It is important to note that the ΔH value is specific to a particular reaction under specific conditions. Therefore, it is not a constant value and can vary depending on factors such as temperature and pressure.
Explanation:hope will help