How much energy is released per gram of hydrogen for the following reaction?

Question

Question

2H₂(g) +O₂ (g) → 2H₂O(g)

a. -483.6 kJ b. -241.8kJ C. -120.9 kJ d. 60.5 kJ e. 241.8 kJ

Answer 1

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Answer #1

6. 2H2(g) + O2(g) ---> 2H2O(g)

DH0rxn = (2*-241.82)-(2*0+1*0)

= -483.64 kj

2 mol H2 = 2*2 g water = -483.64 kj

energy released per gram hydrogen = -483.64/4 = -120.91 kj

answer: c. -120.91 kj

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Answer 2

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