but you need to have a reference curve for known material to compar the area unde the curve. From their ratio of the area under the curve which equal to thei ratio of their heat capacit. The heat capacity of your material can be obtained
Different answer for different instruments. The way a Perkin Elmer instrument does it is different from the way an old DuPont instrument (and others like it) do it.
As James Shelbyy refers you have to take in accounts which is your equipment, and know how it was calibrated to know the necessity of a reference or not that will determine the form of the equations. The Empty crucibe measurement is always necessary to subtract equipment influences.
It also depends on the type of crucibles closed or open and the calibration.
The general procedure for the experiment is presented in the image attached.