Editing Heat capacity (section)

=== Basic definition ===
The heat capacity of an object, denoted by <math>C</math>, is the limit
<math display="block"> C = \lim_{\Delta T\to 0}\frac{\Delta Q}{\Delta T}, </math>
where <math>\Delta Q</math> is the amount of heat that must be added to the object (of mass ''M'') in order to raise its temperature by <math>\Delta T</math>.

The value of this parameter usually varies considerably depending on the starting temperature <math>T</math> of the object and the pressure <math>p</math> applied to it. In particular, it typically varies dramatically with [[phase transition]]s such as melting or vaporization (see [[enthalpy of fusion]] and [[enthalpy of vaporization]]). Therefore, it should be considered a function <math>C(p,T)</math> of those two variables.