Final answer:
The ∆G° for the reaction CaO(s) + CO₂(g) → CaCO₃(s) can be calculated using the equation ∆G° = ∆H° - T∆S°, but the specific temperature is needed to determine the value.
Step-by-step explanation:
The ∆G° for the reaction CaO(s) + CO₂(g) → CaCO₃(s) can be calculated using the equation ∆G° = ∆H° - T∆S°, where ∆H° is the change in enthalpy and T∆S° is the change in entropy. Given that the ∆H° for the reaction is 177.8 kJ/mol and the ∆S° is 160.5 J/K mol, we can substitute these values into the equation. However, we also need the temperature, which is not provided. The value of ∆G° will depend on the specific temperature at which the reaction occurs.