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Atmospheric chemistry pure oxygen atmosphere

Further, a change in temperature will modify all temperature-dependent photochemical rates and hence will feed back to the ozone chemistry. This renders the temperature-ozone relation into a tightly coupled and non-linear system that can be better understood with the aid of some simple chemical arguments. If a pure oxygen atmosphere is assumed (see Chapter 5), the interaction between ozone density and temperature dependent rates is expressed by ... [Pg.446]

The catalytic oxidation of sulphurous acid in aqueous medium to sulphuric acid [138, 84] has been suggested as a probe reaction for the ability of a carbon to activate molecular oxygen at ambient conditions. Besides this remarkable property the reaction is of interest in atmospheric chemistry where it provides a sink for all nonphotochemically oxidized sulfur dioxide [215]. Carbon plays a special role in this environmental application as both pure carbon and active particles (iron oxide [84] for example) anchored to carbon can act as efficient catalysts. The detailed analysis of the reactivity of various types of carbon [138] reveal that basic surface oxides (see Fig. 23) are important to fix the educt HSOj ion. It was found, in addition, that the... [Pg.144]

In this chapter we examine solutions. Solutions are everywhere, both inside and outside the chemistry laboratory. All natural waters are solutions. What we call "fresh water" has a very low concentration of dissolved substances the concentration is much higher with ocean water, or "salt water." "Hard water" has calcium and magnesium salts dissolved in it. Rainwater is nearly pure, but even rainwater is a solution of atmospheric gases in very low concentrations. The small amount of oxygen dissolved in rivers, lakes, and oceans is mighty important to fish, which cannot sun/ive without it. [Pg.458]


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