The constant co is the value of c at some standard temperature oo.
All determinations must accordingly be reduced to a standard temperature for comparison.
Its weight is so adjusted that an additional weight of 5 grammes must be placed in the upper pan to cause the instrument to sink to the mark on the stem in distilled water at the standard temperature.
The specific heat of a substance is sometimes defined as the thermal capacity of unit mass, but more often as the ratio of the thermal capacity of unit mass of the substance to that of unit mass of water at some standard temperature.
There Is More Diversity Of Opinion With Regard To The Question Of The Standard Temperature.