Chemistry Practice Problems Entropy Practice Problems Solution: When an aqueous solution containing Al 3+ at 25°C ...

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Solution: When an aqueous solution containing Al 3+ at 25°C is mixed with an aqueous solution of hydroxide at 25°C an immediate precipitate of insoluble aluminum hydroxide is formed: Al 3+ (aq) + 3 OH – (aq) →  Al(OH)3 (s) The standard reaction enthalpy (ΔH°) of this reaction is -61.33 kJ/mol. a) Calculate ΔS°, ΔSsurr and ΔStot for this reaction

Problem

When an aqueous solution containing Al 3+ at 25°C is mixed with an aqueous solution of hydroxide at 25°C an immediate precipitate of insoluble aluminum hydroxide is formed: Al 3+ (aq) + 3 OH(aq) →  Al(OH)3 (s) The standard reaction enthalpy (ΔH°) of this reaction is -61.33 kJ/mol.

a) Calculate ΔS°, ΔSsurr and ΔStot for this reaction