| Filled pressure and volume are
given for a temperature of 70°F. Temperatures above that
will produce somewhat higher pressure readings and give a
mildly exaggerated value for the contents. Below 70°F,
the pressure will be lowered and the volume of gas slightly
less than the X-value would indicate.
The relationship is approximate for gases whose densities
are directly proportional to their absolute temperatures
(ideal gas) within a given range of pressures. This relationship
also presumes other gas properties, such as compressibility,
remain constant within that range of pressure. If the pressure
change is large enough, compressibility will change, so
other calculation methods should be used.
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