Answer to Question #92427 in Chemistry for Tj

Question

Use Hess' Law to calculate enthalpy of reaction for the following equation:

2 N2(g) + 5 O2(g) → 2 N2O5(g)

Given:

2 H2(g) + O2(g) → 2 H2O(l) ΔH = -571.6 kJ /mol

N2O5(g) + H2O(l) → 2 HNO3(l) ΔH = -76.6 kJ /mol

1/2 N2(g) + 3/2 O2(g) + 1/2 H2(g) → HNO3(l)
ΔH = -174.1 kJ /mol

(Please note that you must include units throughout all of your calculations and provide your answer in scientific notation to the correct number of significant digits.)

Answer 1

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