Nitrous oxide isotherms

An isotherm is a line of constant temperature and it forms part of a diagram that shows the relationship between temperature, pressure and volume. The graph is gas specific and usually relates to nitrous oxide. Three lines are chosen to illustrate the volume-pressure relationship above, at and below the critical temperature. 

A statistical thermodynamic equation for gas adsorption on synthetic zeolites is derived using solid solution theory. Both adsorbate-adsorbate and adsorbate-adsorbent interactions are calculated and used as parameters in the equation. Adsorption isotherms are calculated for argon, nitrogen, ammonia, and nitrous oxide. The solution equation appears valid for a wide range of gas adsorption on zeolites. 

This kinetic behavior indicates a rate-determining surface reaction of weakly adsorbed nitrous oxide on a surface which adsorbs ammonia according to Langmuir s isotherm. The adsorption energy of ammonia on the active surface was found to be 2.2 kcal./mol. 

Analyte Atomization and Ionization Figure 10-4 shows temperatures in the plasma using isothermal contours. Sample atoms reside in the plasma for about 2 ms before they reach the observation point. During the residence time they experience temperatures ranging from 5500 to 80(X) K. The time and temperatures are roughly two to three times greater than those found in the hottest combustion flames (acetylene-nitrous oxide) used in flame spectroscopic methods. As a result, atomization is more complete in... 

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