Please show me how you got the answer. Thank you! Nitric acid can be formed in t

Question

Please show me how you got the answer. Thank you!

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. In the first step, nitrogen and hydrogen react to form ammonia: N2(g) + 3H2(g) rightarrow 2NH3(g) Delta H=-92.kJ In the second step, ammonia and oxygen react to form nitric acid and water: NH3(g) + 202(g) rightarrow HNO3(g) + H20(g) Delta H= -330.kJ Calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen. Round your answer to the nearest kJ.

Explanation / Answer

-92/2 - 330 = -376 KJ

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