Many Different Reactions
Any liquid-liquid or liquid-solid chemical reaction
in which heat is evolved or absorbed within a tem-
perature range from 10 to 50 °C can be studied in
the 6755 Calorimeter.
Heats of Reaction, either endothermic or exother-
mic, can be determined in many different systems,
ranging from simple acid-based reactions to more
complicated redox, chelation, hydrolysis, protona-
tion and other reactions. The calorimeter is particu-
larly effective for assays of weak acids and weak
bases which do not respond readily to other detec-
tion methods. It can also be used for rapid specific
ion determinations by thermochemical methods as
best illustrated by determination of sulfur using
barium chloride to precipitate barium sulfate from a
sulfate solution.
The heat of solution produced when a solid dis-
solves in a liquid can be measured easily. Similarly,
the calorimeter can be used to measure the heat of
dilution produced by diluting a solution with solvent
or with a solution of a lower concentration. It will
also measure the heat of mixing, produced when
two liquids are combined.
The heat of wetting as measured with this
calorimeter serves not only as a thermochemical
measurement, but also as a rapid method for deter-
mining the surface area of a powdered solid, since
the heat released when a powder is treated with a
wetting agent will be proportional to the exposed
surface area.
A Well Insulated Reaction Chamber
All reactions in the 6755 Calorimeter are con-
ducted in a fully silvered glass Dewar. The Dewar
is supported within a stainless steel air can from
which it is easily removed for filling or cleaning.
A block of plastic foam surrounds the air can,
with the entire assembly mounted in a rugged
aluminum case.
A Unique, Rotating Sample Cell
A closed glass bell with a detachable bottom
holds a solid or liquid sample in the Dewar and also
serves as the stirrer for the calorimeter system. The
bottom of the cell is closed with a Teflon dish which
fits snugly into the bell without requiring a gasket
6755 Calorimeter Cross Section
130C Sample Cell with 126C Bottom Dish
S o l u t i o n a n d S e m i m i c r o C a l o r i m e t e r s
B u l l e t i n 6 7 0 0
5
1 - 8 0 0 - 8 7 2 - 7 7 2 0
