The science or act of measuring modifications in state variables of a body for the aim of obtaining the heat transfer related to the modifications of its state due is known as calorimetry. The calorimetry is conducted with the help of calorimeter.
Calorimetry is fundamentally the science related to the exchange of heat with the surroundings. Therefore, the defining equation of calorimetry will be ΔQ1 +ΔQ2 = 0.