I have not heard this equation called by a particular name other than, "required heat" or "specific heat". However, for those not familiar with the equation. It is; the amount of heat to be supplied to or extracted from a substance to change it's temperature. This equation is commonly used for liquids and solids. Where the specific heat is generally independent of pressure.
Where:
Q = heat
q= heat per unit mass
m = mass of substance
Cp = specific heat of substance
delta t = temperature difference
This equation is essentially a statement of the first law of thermodynamics in terms of Avg. Cp (rather than enthalpies). Heat input (Q) = (Heat absorbed).
-j.katz