In a single molecule of kf, the equilibrium internuclear separation is r0 = 2.67 å and the lattice energy (-ei ) is 0.50 ev/molecule smaller than the coulomb attractive energy, because of overlap repulsion. given that the electron affinity of fluorine is 4.07 ev/electron and that the first ionization energy of potassium is 4.34 ev, show that the energy necessary to separate the molecule into neutral atoms is -0.945 ei.

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 .