How much heat will be absorbed when 39.95g of bromine reacts with excess H2 according to the equation: H2 + Br2= 2HBr Delta hr= 72.80kj
Options
A. 18.2kj
B. 72.80kj
C. 291.2kj
D. 1.82 KJ
E. 36.4 kj

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: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .