# Problem: Calculate the enthalpy of the reaction4B(s) + 3O2(g) → 2B2O3(s)given the following pertinent information:A. B2O3(s) + 3H2O(g) → 3O2(g) + B2H6(g),       ΔH∘A = +2035 kJB. 2B(s) + 3H2(g) → B2H6(g),   ΔH∘B = +36 kJC. H2(g) + 1/2O2(g) → H2O(l),    ΔH∘C = −285 kJD. H2O(l) → H2O(g),     ΔH∘D = +44 kJ

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###### Problem Details

Calculate the enthalpy of the reaction

4B(s) + 3O2(g) → 2B2O3(s)

given the following pertinent information:

A. B2O3(s) + 3H2O(g) → 3O2(g) + B2H6(g),       ΔH= +2035 kJ

B. 2B(s) + 3H2(g) → B2H6(g),   ΔH= +36 kJ

C. H2(g) + 1/2O2(g) → H2O(l),    ΔH= −285 kJ

D. H2O(l) → H2O(g),     ΔH= +44 kJ

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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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Based on our data, we think this problem is relevant for Professor Mohammadi's class at CSULB.