Calculate the enthalpy change for the following reaction at 25°C. The value of ΔH°f in kJ/mol is given below each species:
Al³⁺ (aq) + 3 OH- (aq) → Al(OH) ₃(s)
-531 -230.0 -1276

Question

Calculate the enthalpy change for the following reaction at 25°C. The value of ΔH°f in kJ/mol is given below each species: Al³⁺ (aq) + 3 OH- (aq) → Al(OH)₃(s) -531 -230.0 -1276

Quizplus · Accepted Answer

The enthalpy change for the reaction is calculated using ΔH° = ΣΔH°f(products) - ΣΔH°f(reactants). For the reaction: ΔH° = [-1276] - [(-531) + 3(-230)] = -1276 + 531 + 690 = -55 kJ.

Calculate the Enthalpy Change for the Following Reaction at 25°C