# 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

###### FREE Expert Solution
99% (397 ratings)
###### FREE Expert Solution
99% (397 ratings)
###### Problem Details

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

2MnO(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

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hess's Law concept. You can view video lessons to learn Hess's Law. Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems.

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Our tutors rated the difficulty ofUse the following data to calculate the standard heat (entha...as medium difficulty.

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Based on our data, we think this problem is relevant for Professor Dumont's class at McMaster University.