When analyzing kinetic data or designing a chemical reactor, it is important
to state clearly the definitions of reaction rate, conversion, yield, and selectivity.
For a homogeneous reaction, the reaction rate is defined either as the
amount of product formed or the amount of reactant consumed per unit
volume of the gas or liquid phase per unit time. We generally use moles
(g mol, kg mol, or lb mol) rather than mass to define the rate, since
this simplifies the material balance calculations.
event target when the event is dispatched. The “Default behavior” column lists Flash Player’s native response to the event. The “Bubbles” column indicates whether the event has a bubbling phase. The “Datatype of object passed to listener function” column specifies the datatype of the object passed to the listener function that handles the event. Finally, the “Notes” column lists important information regarding the event’s use. Spend a little time getting to know Flash Player’s mouse events by perusing Table 22-1.
The purging device must be designed to accept 5 mL samples with a water
column at least 3 cm deep. The gaseous head space between the water column
and the trap must have a total volume of less than 15 mL. The purge gas
must pass though the water column as finely divided bubbles with a diameter
of less than 3 mm at the origin. The purge gas must be introduced no more
than 5 mm from the base of the water column. The purging device illustrated
in Figure 1 meets these design criteria.
An inert gas is bubbled through a 5 mL water sample contained in a
specially-designed purging chamber at ambient temperature. The purgeables are
efficiently transferred from the aqueous phase to the vapor phase. The vapor is swept
through a sorbent trap where the purgeables are trapped. After purging is completed,
the trap is heated and backflushed with the inert gas to desorb the purgeables onto a
gas chromatographic column. The gas chromatograph is temperature programmed to
separate the purgeables which are then detected with a mass spectrometer....