Using the equations SrO (s) + CO₂ (g) → SrCO₃ (s) ∆H° = -234 kJ/mol

2 Sr(s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol

CO₂ (g) → C(s) + O₂ (g) ∆H° = 394 kJ/mol

Determine the enthalpy (in kJ/mol) for the reaction

2 SrCO₃ (s) → 2 Sr (s) + 2 C(s) + 3 O₂ (g).

I also need it in exact sig figs.