Problem: Use the following data to calculate the standard heat (enthalpy) of formation, ΔH °f, of manganese(IV) oxide, MnO2 (s). 2MnO2 (s) → 2MnO (s) + O2 (g) ΔH = 264 kJ MnO2 (s) + Mn(s) → 2MnO (s) ΔH = -240 kJ Select one:(a) -504 kJ (b) -372 kJ (c) 24 kJ (d) -24 kJ (e) 504 kJ

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Use the following data to calculate the standard heat (enthalpy) of formation, ΔH °_f, of manganese(IV) oxide, MnO₂ (s).

2MnO₂(s) → 2MnO (s) + O₂ (g) ΔH = 264 kJ

MnO₂ (s) + Mn(s) → 2MnO (s) ΔH = -240 kJ

Select one:

(a) -504 kJ

(b) -372 kJ

(d) -24 kJ

(e) 504 kJ