Absorption coefficients of nitrogen

The absorption coefficient of nitrogen dioxide was measured for several mercury lines by Holmes and Daniels (5). The resolved spectra of the nitrogen dioxide-nitrogen tetroxide system were separated by Hall and Blacet (4)- The value they found for the absorption coefficient at 3660 A. was in essential agreement with that obtained by Holmes and Daniels. The absorption cross section of 6.8 X 10 sq. cm. for nitrogen dioxide at 3660 A. was calculated from the data of Holmes and Daniels. 

The absorption coefficient (of solubility) a of a gas is the volume of gas reduced to 0 C and 1 atm. pressure which will be dissolved by unit volume of solvent at the experimental temperature under a partial pressure of the gas of 1 atm. Show that for a dilute solution, Ns in equation (36.23) may be replaced by a. The absorption coefficient of nitrogen is 0.01685 at 15" and 0.01256 at 35 C. Determine the mean differential heat of solution per mole of nitrogen in the saturated solution in this temperature range. 

Jones, E.J., and O.R. Wulf, The absorption coefficient of nitrogen pentoxide in the ultraviolet and the visible absorption spectrum NO3. J Chem Phys 5, 873, 1937. 

Marmo, F.F., Absorption coefficients of nitrogen oxide in the vacuum ultraviolet. J Opt Soc Amer 43, 1186, 1953. 

---